The correct answer is option 1, which states that statement 1 only is correct.
The Agni-II missile is indeed a surface-to-surface missile that is capable of carrying a nuclear warhead. It is launched from a mobile launcher, allowing for flexibility and mobility in its deployment.
However, statement 2 is incorrect. The Agni-II missile does not have a striking range of 3500 km. In reality, the Agni-II missile has a range of approximately 2,000-3,000 km, which falls short of the stated range in the second statement.
Therefore, the correct answer is option 1; only statement 1 is correct.
Alert - correct answer should be option 4: Neither 1 nor 2.