1. Consider the following statements regarding pneumococcal disease:

1. It is caused by Streptococcus pneumoniae, whose major virulence factor is its polysaccharide capsule.
2. Pneumococcal disease can manifest as both mild (such as ear infections) and severe illnesses (like meningitis).
3. Pneumococcal vaccines are primarily targeted at children, as adults are not vulnerable to the disease.

Which of the statements given above is/are correct?

• 1 only
• 1 and 2 only
• 2 and 3 only
• 1, 2 and 3

2. With reference to Sukhna Lake, consider the following statements:

1. It is a natural lake formed at the foothills of the Pir Panjal range.
2. It has been declared a National Wetland by the Government of India.
3. It was created by damming a seasonal stream in 1958.

Which of the statements given above are correct?

• 1 and 2 only
• 1 and 3 only
• 2 and 3 only
• 1, 2 and 3

3. Consider the following statements about rhino conservation in Assam:

1. The greater one-horned rhinoceros is listed as Endangered on the IUCN Red List.
2. Kaziranga National Park hosts the largest population of the species in Assam.
3. Operation Falcon, launched in 2024, has led to a significant reduction in poaching incidents.

Which of the statements given above is/are correct?

• 1 only
• 2 and 3 only
• 1 and 2 only
• 2 and 3 only

4. With reference to the Sixth Schedule of the Constitution, consider the following statements:

1. It provides for Autonomous District and Regional Councils in some north-eastern states.
2. These councils have legislative, judicial, and taxation powers.
3. Currently, it applies to Assam, Meghalaya, Tripura, Mizoram, and Ladakh.

Which of the statements given above are correct?

• 1 and 2 only
• 2 and 3 only
• 1 and 3 only
• 1, 2 and 3

5. Which of the following best describes the role of EDE-like antibodies in dengue immunity?

• They are serotype-specific antibodies that neutralize only one type of dengue virus.
• They are broadly neutralising antibodies effective across all four serotypes.
• They enhance the risk of Antibody-Dependent Enhancement (ADE).
• They are found only in individuals never exposed to dengue infection.