1. The Agni-II is an Intermediate Range Ballistic Missile (IRBM) developed by India as part of the Agni series.
2. Its operational range is generally stated to be over 2000 km, capable of carrying a nuclear payload.
3. Some sources mention a potential range extending up to 3500 km depending on the payload weight.
4. Among the given options, 2000 km represents the widely acknowledged operational capability and lower bound of its effective range.