`Dhruv` in the context of Indian defense is an `Advanced Light Helicopter`. The options provided represent different aspects of defense mechanisms.

Option 1 suggests it being an `Aircraft-carrying warship`, which isn`t accurate as `Dhruv` is an aerial vehicle, not a sea-borne entity.

Option 2 points towards it being a `Missile-carrying submarine` but again, it doesn`t align since `Dhruv` is an airborne vehicle and doesn`t sail or submerge underwater.

Option 3, which is the correct answer, identifies `Dhruv` as an `Advanced Light Helicopter`. This is accurate, as `Dhruv` is a multi-role, new generation helicopter built by Hindustan Aeronautics Limited (HAL) in India.

Option 4 suspects it as an `Intercontinental ballistic missile`, which isn`t correct because `Dhruv` is a helicopter, not a missile.