The Chemical Weapons Convention (CWC) was held in:

1992

The correct answer is Option (3) - 1992

The Chemical Weapons Convention (CWC) was held in 1992 (according to the prerationalised NCERT).

NCERT Extract (Pre rationalised Version): "Traditional views of security do not rule out other forms of cooperation as well. The most important of these are disarmament, arms control, and confidence building. Disarmament requires all states to give up certain kinds of weapons. For example, the 1972 Biological Weapons Convention (BWC) and the 199e Chemical Weapons Convention (CWC) banned the production and possession of these weapons. More than 155 states acceded to the BWC and 193 states acceded to the CWC. Both conventions included all the great powers. But the superpowers — the US and Soviet Union — did not want to give up the third type of weapons of mass destruction, namely, nuclear weapons, so they pursued arms control."

NOTE: As per New NCERT edition (2025-26) , the Chemical Weapons Convention (CWC) was held in 1997 which banned the production and possession of these weapons..