This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
Bhopal gas tragedy was caused by? 
Select and explain. 
A. MIC, B. Sulphur dioxide, C. Hydrocarbons, D. CFC
A: MIC
Answer: A: MIC 
Explanation: Bhopal gas tragedy in India is a sudden disaster occurred on 3rd December 1984, in which leakage in the storage tank of union carbide pesticide plant released tons of methyl isocyanate into the air. About 2 million people were exposed to gas leaving about 3000 dead . people are still suffering from the adverse effects of the gas.