The Bhopal gas tragedy occurred on December 2-3, 1984, in Bhopal Madhya Pradesh, India. There was a massive release of the toxic gas from a pesticide plant owned by the Union Carbide Corporation. There was a release of methyl isocyanate (MIC). The leak is due to the poor maintenance, inadequate safety measure and the lack of emergency preparedness
So, the correct answer is (B): 1984