Step 1: Understand the question
The question is about a defence event in October 2005 when India test-fired three medium-range surface-to-air missiles, and we are asked to name the missile.
Step 2: About the missile
The missile in question is **Akash**, which is an indigenously developed medium-range surface-to-air missile (SAM). It was developed by the Defence Research and Development Organisation (DRDO) under India’s Integrated Guided Missile Development Programme (IGMDP).
Step 3: Features of Akash missile
- Range: Approximately 25–30 km.
- Payload: Can carry a warhead of about 60 kg.
- Guidance: Uses a sophisticated radar-based guidance system to intercept enemy aircraft and drones.
- Purpose: Designed to defend airfields, vital installations, and strategic points against air attacks.
Step 4: Context of the 2005 test
In October 2005, India successfully test-fired three Akash missiles to validate its operational readiness and accuracy. These tests demonstrated India’s growing self-reliance in defence technology.
Final Answer: The correct option is (D) Akash.