Which missile is designed to defend large installation like oil-fields etc. against enemy air attacks?

Akash
Nag
Agni
Prithvi

The correct answer is Akash.

Akash is a medium-range surface-to-air missile (SAM) system developed by the Defence Research and Development Organisation (DRDO) of India. It is designed to defend large installations like oil-fields etc. against enemy air attacks.

Akash is a two-stage missile with a solid-propellant booster and a liquid-propellant sustainer. It has a range of 25-30 km and can engage targets at altitudes of up to 18,000 m. The missile is guided by a radar-command guidance system and can carry a high-explosive fragmentation warhead.

Akash was inducted into the Indian Air Force in 2009 and the Indian Army in 2012. It has also been exported to Bangladesh and Sri Lanka.

The other options are incorrect because:

  • Nag is a short-range anti-tank guided missile (ATGM).
  • Agni is a long-range ballistic missile.
  • Prithvi is a short-range ballistic missile.