Which reference to Agni-IV Missile, which of the following statements is/are correct? (1). It is a surface-to-surface missile. (2). It is fuelled by liquid propellant only. (3). It can deliver one-tonne nuclear warheads about 7500 km away. Select the correct answer using the code given below.

Only statement 1 is correct. Agni-IV is a surface-to-surface ballistic missile, developed by DRDO under the Integrated Guided Missile Development Programme, and it is a two-stage, solid-propellant missile. That makes statement 2 wrong, since 'liquid propellant only' is the opposite of the design. Its publicly stated range is roughly 3,500 to 4,000 km, not 7,500 km, so statement 3 is wrong. The 7,500 km figure is a common confusion with the longer-range plans for later Agni-class missiles.

The core concept is the distinction between solid and liquid propulsion. Solid fuel allows quicker launch readiness, road mobility and canister storage, which matters for second-strike deterrence and for the Mains angle on India's nuclear doctrine and the No First Use policy.

Trap: aspirants remember Agni-IV as a long-range missile and accept the 7,500 km figure, or assume all Indian strategic missiles are liquid-fuelled because older systems were.