Solution:Match List-I (Nuclear Arms Control Agreement) with List-II (Purpose):A. SALT-I → I. Limits strategic nuclear weapons – The Strategic Arms Limitation Talks I (1972) aimed to limit the number of strategic ballistic missile launchers.
B. START-I → II. Limits the number of nuclear warheads and delivery systems – The Strategic Arms Reduction Treaty (1991) reduced strategic offensive arms including nuclear warheads and delivery vehicles.
C. PTBT → III. Bans atmospheric, underwater and outer-space nuclear tests – The Partial Test Ban Treaty (1963) prohibited nuclear tests in these environments.
Test Ban Treaty (1963) prohibited nuclear explosions in the atmosphere, underwater, and outer space.
D. NPT → IV. Prohibits acquisition of nuclear weapons by non-nuclear states – The Non-Proliferation Treaty (1968) prevents the spread of nuclear weapons and promotes disarmament.
Correct matching: A–I, B–II, C–III, D–IV.