When did Bhopal Gas Tragedy took place?
On the night of December 3, 1984 one chemical known as methyl isocyanate spilt out from the Union Carbide India Ltd’s means UCIL's pesticide factory. That turned the city of Bhopal into a huge gas chamber. It was first major industrial accident and popular as Bhopal gas tragedy.
From the above facts show the correct answer the Bhopal gas tragedy occurred in 1984. Thus correct option is C.