25 APRIL 2026

Q1. Consider the following statements regarding South Korea:

1. It shares its only land border with North Korea along the Demilitarized Zone (DMZ).
2. It is surrounded by the South China Sea to the west.
3. The Han River flows through Seoul.

Which of the statements given above are correct?

A. 1 and 3 only

B. 2 and 3 only

C. 1 and 2 only

D. 1, 2 and 3

Q2. Consider the following statements regarding India’s foodgrain stock:

1. India currently holds foodgrain stocks significantly higher than the prescribed buffer norms.
2. Buffer stock norms are fixed by the Finance Commission annually.
3. Buffer stock helps in stabilising food prices and ensuring supply during emergencies.

Which of the statements given above are correct?

A. 1 and 3 only 

B. 2 and 3 only

C. 1 and 2 only

D. 1, 2 and 3

Q3. With reference to 3D glass semiconductor technology, consider the following statements:

1. It relies on traditional silicon-based planar (2D) chip structures.
2. It enables vertical stacking of chip components for higher efficiency.
3. It integrates logic, memory, and sensors into a single compact unit.

Which of the statements given above are correct?

A. 1 only

B. 1 and 2 only

C. 2 and 3 only

D. 1, 2 and 3

Q4. Assertion (A): Illegal sand mining in riverbeds leads to increased flooding risk.

Reason (R): Removal of sand alters river flow patterns and destabilizes river channels.

A. Both A and R are true, and R is the correct explanation of A 

B. Both A and R are true, but R is not the correct explanation

C. A is true, but R is false

D. A is false, but R is true