Security policy concerned with preventing war is called -

Deterrence

The correct answer is Option (4) → Deterrence

Deterrence is a strategy used by states to discourage a potential adversary from taking a certain action, such as an armed attack, by threatening them with unacceptable costs or punishment. The goal is to prevent the war from ever starting. In the context of the Cold War, the nuclear standoff between the US and the USSR was a classic example of a deterrence strategy, based on the principle of mutually assured destruction (MAD).