What is India's policy on the use of nuclear weapons, as stated in its Nuclear Doctrine adopted in 2003?
1
"No First Use" (NFU) of nuclear weapons, with minimum deterrence and non-use against non-nuclear weapon states.
2
"First Use" of nuclear weapons for deterrence purposes against any potential threat
3
"No Use" of nuclear weapons under any circumstances, even in the event of a nuclear attack.
4
"Conditional Use" of nuclear weapons based on the severity of the threat faced by India.