With 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.

1. Statement 1 is correct. The Agni-IV is an intermediate-range ballistic missile developed by India under the Integrated Guided Missile Development Programme. It is launched from the ground (or a mobile launcher on the ground) and targets locations on the ground, making it a surface-to-surface missile. 2. Statement 2 is incorrect. Agni-IV is a two-stage missile, and both stages are powered by solid propellants. It is not fuelled by liquid propellant. 3. Statement 3 is incorrect. The stated range of Agni-IV is around 3500 to 4000 km. While it can carry a one-tonne nuclear warhead (or conventional warhead), its range is significantly less than 7500 km. The Agni-V missile has a longer range (over 5000 km). Therefore, only statement 1 is correct.