The UN agency concerned with the safety and peaceful use of nuclear technology is:

(a) The UN Committee on Disarmament

(b) International Atomic Energy Agency

(c) UN International Safeguard Committee

(d) None of the above

Option (b) - IAEA (International Atomic Energy Agency) is an international body established in 1957 that seeks to promote the peaceful use of nuclear energy and discourage its usage for military purposes.

The UN Committee on Disarmament is concerned with promoting disarmament among nations of the world and establish peace.

The UN International Safeguard Committee aims at overall security and safety of the nations.