This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Gas responsible for Bhopal Gas tragedy was: 
Select and explain. 
A. Methyl isocyanate, B. Potassium isocyanate, C. Sodium isocyanate, D. Ethyl isocyanate
A: Methyl isocyanate
Answer: A: Methyl isocyanate 
Explanation: Methyl isocyanate