Q.139 Zoology ⭐ 360° Option Elimination Active

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NEET 2026 Zoology Question 139 Solution

Topic: Reproductive Health · Official NTA Booklet Code 50

Question

Which of the following disease is not sexually transmitted?

(1)Syphilis
(2)Tuberculosis
(3)Gonorrhoea
(4)Genital warts

✓

Verified Against NTA Final Answer Key

Option (2) : Tuberculosis

📚 Reproductive Health Easy

📋 Given Parameters & Problem Setup

Evaluation Goal Identify disease that is NOT sexually transmitted

Candidate Diseases Syphilis, Tuberculosis, Gonorrhoea, Genital warts

⚡

The 30-Second Exam Hall Shortcut: ⚡ STI Elimination Hack

⏱️ Save ~40 seconds

Tuberculosis is an Airborne Lung Infection (Droplet Transmission), NOT an STI!

1 Review the four diseases:

2 Syphilis -> STI caused by bacterium Treponema pallidum.

3 Tuberculosis -> Respiratory disease caused by Mycobacterium tuberculosis transmitted through inhaled airborne droplets.

4 Gonorrhoea -> STI caused by bacterium Neisseria gonorrhoeae.

5 Genital warts -> STI caused by Human Papillomavirus (HPV).

6 Tuberculosis is clearly NOT an STI.

7 Select Option (2) in under 5 seconds!

🛡️

Why You Can 100% Trust This Shortcut: NCERT Biology · Reproductive Health (Infertility & Assisted Reproductive Technologies: ART classifications).

📐

Step-by-Step Rigorous Workflow & Mathematical Proof

Step 1

Definition and Catalog of Sexually Transmitted Infections

Infections or diseases that are transmitted through sexual intercourse are collectively termed Sexually Transmitted Infections (STIs) or Venereal Diseases (VD).

\text{STIs} = \{\text{Gonorrhoea}, \; \text{Syphilis}, \; \text{Genital herpes}, \; \text{Chlamydiasis}, \; \text{Genital warts}, \; \text{Trichomoniasis}, \; \text{Hepatitis-B}, \; \text{HIV}\}

• Options (1), (3), and (4) are all standard canonical STIs.

Step 2

Transmission Mode of Tuberculosis

Tuberculosis (TB) is an infectious bacterial disease caused by Mycobacterium tuberculosis. It primarily attacks the pulmonary parenchyma and is transmitted through aerosols and airborne droplet nuclei released during coughing, sneezing, or spitting by an infected person.

\text{Tuberculosis} \xrightarrow{\text{Mode of Transmission}} \mathbf{Airborne\text{ / Droplet infection (Respiratory tract)}}

• It is not categorized as an STI.

Step 3

Conclusion

Among the listed options, Tuberculosis is not a sexually transmitted disease.

\text{Not an STI} = \mathbf{Tuberculosis} \implies \text{Option (2)}

• Matches official NTA final answer key Option B / (2).

⭐

360° Option Elimination Engine Key Feature

Diagnose every choice: Know exactly why the right option works and why distractors fail.

4-Option Deep Scan

1 A

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Syphilis is a canonical bacterial STI caused by Treponema pallidum.

⚠️

Student Fallacy (Why candidates pick this trap): Failing to read the negative stem "not sexually transmitted".

2 B

✓ 100% Correct

Verdict & Scientific Reason:

100% accurate. Tuberculosis is an airborne respiratory infection spread via droplet nuclei, not sexual contact.

💡

Why this is airtight: None; immediate epidemiology recognition.

3 C

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Gonorrhoea is a major bacterial STI caused by Neisseria gonorrhoeae.

⚠️

Student Fallacy (Why candidates pick this trap): Misclassifying a classic venereal disease.

4 D

✗ Incorrect

Verdict & Scientific Reason:

Incorrect. Genital warts are a viral STI caused by low-risk types of HPV.

⚠️

Student Fallacy (Why candidates pick this trap): Overlooking viral STIs.

⚠️

NTA Trap Alert: Hepatitis B & HIV Transmission Confusion

While Hepatitis-B and HIV can also be transmitted via blood transfusion or needles, they ARE sexually transmitted. Tuberculosis, however, has zero sexual transmission etiology.

🛡️ How to avoid the -1 mark: Remember: TB attacks the lungs via the air; it does not belong in the STI clinic.

📖

Core NEET Syllabus Standard

NEET Biology Core Syllabus · Reproductive Health Standard Benchmark

Core Scientific Principle Tested:

"STIs encompass gonorrhoea, syphilis, genital herpes, chlamydiasis, genital warts, trichomoniasis, hepatitis-B, and HIV. Tuberculosis is an airborne pulmonary disease."

Syllabus Focus: Sexually Transmitted Infections (STIs)

✓ Core NEET UG Syllabus Anchor Syllabus & Academic Standards ↗

TB rides the air through cough and sneeze; Gonorrhoea and Syphilis are venereal disease!

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NEET 2026 Zoology Question 139 Solution

Question

The 30-Second Exam Hall Shortcut: ⚡ STI Elimination Hack

Step-by-Step Rigorous Workflow & Mathematical Proof

Definition and Catalog of Sexually Transmitted Infections

Transmission Mode of Tuberculosis

Conclusion

360° Option Elimination Engine Key Feature

NTA Trap Alert: Hepatitis B & HIV Transmission Confusion

Core NEET Syllabus Standard

Ready to attempt under real exam pressure?

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