1. Which one of the following can directly trigger an earthquake swarm through an increase in pore-fluid pressure?

• Fluid movement through cracks and faults
• Reduction in atmospheric pressure
• Ocean evaporation
• Increased solar radiation

2. Why is the Sun–Earth L2 point particularly suitable for a space observatory such as Roman?

• It places the spacecraft permanently between the Sun and Earth.
• It provides a relatively stable observing configuration with a suitable geometry for deep-space observations.
• It eliminates the gravitational influence of both the Sun and Earth.
• It allows the telescope to orbit the Moon without propulsion.

3. With reference to corporate investment, consider the following statements:

1. It includes expenditure on long-term productive assets such as factories and machinery.
2. Greenfield projects involve creation of new facilities.
3. Brownfield investment involves expansion or upgrading of existing facilities.
4. It forms an important component of Gross Fixed Capital Formation.

Which of the statements given above are correct?

• 1 and 2 only
• 1, 2 and 3 only
• 2, 3 and 4 only
• 1, 2, 3 and 4

4. Consider the following statements regarding Exercise MAITREE-XV:

1. The 2026 edition is being held in Thailand.
2. The exercise is hosted alternately by India and Thailand.
3. It focuses exclusively on conventional maritime warfare.
4. The 2026 edition marks 20 years since the exercise was launched.

Which of the statements given above are correct?

• 1 and 2 only
• 1, 2 and 4 only
• 2, 3 and 4 only
• 1, 2, 3 and 4

5. Which one of the following is NOT identified in the source as an ecosystem or landscape covered by India's Guide to Grasslands and Other Open Natural Ecosystems?

• Thar and Banni landscapes
• Deccan savannas
• Western Ghats rocky plateaus
• Sundarbans mangrove delta