1. With reference to Meningococcal disease, consider the following statements:

1. It is caused by a virus transmitted through contaminated water.
2. It can lead to meningitis as well as bloodstream infection.
3. It spreads primarily through close contact involving respiratory secretions.

Which of the statements given above is/are correct?

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

2. Exercise Vayu Shakti-26 is best described as:

• A joint naval exercise between India and France
• A biennial operational exercise of the Indian Air Force
• A tri-service counter-terrorism drill
• A missile defence test conducted by DRDO

3. With reference to Very Short-Range Air Defence System (VSHORADS), consider the following statements:

1. It is a man-portable surface-to-air missile system.
2. It has a maximum engagement range of about 8 km.
3. It has been developed by ISRO for space defence applications.

Which of the statements given above is/are correct?

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

4. Grid oscillations occur mainly due to:

• Excessive coal imports
• Sudden mismatch between electricity demand and supply
• Cyber attacks on power plants
• Increase in nuclear power generation

5. The Raman Effect refers to:

• Reflection of light from metallic surfaces
• Splitting of white light into seven colours
• Change in wavelength of scattered light due to molecular interaction
• Absorption of ultraviolet radiation by ozone