The correct answer is D. Methyl isocyanate.
Methyl isocyanate (MIC) is a highly toxic chemical that was used
in the production of pesticides at the Union Carbide India Limited (UCIL) plant in Bhopal, India. On December 2, 1984, a leak of MIC from the plant killed an estimated 20,000 people and injured over 100,000 others. It is considered one of the worst industrial disasters in history.Carbon dioxide (CO2) is a gas that is naturally present in the atmosphere. It is also produced as a byproduct of combustion and other industrial processes. CO2 is not considered to be a toxic gas, but it can be harmful in high concentrations.
Nitrogen dioxide (NO2) is a gas that is produced by the combustion of fossil fuels. It is also a major component of smog. NO2 is a respiratory irritant and can cause inflammation of the lungs.
Sulphur dioxide (SO2) is a gas that is produced by the combustion of fossil fuels and other industrial processes. It is also a major component of acid rain. SO2 can cause respiratory problems and can damage plants and crops.
In conclusion, the Bhopal gas tragedy was caused by the leakage of methyl isocyanate, a highly toxic chemical. The leak killed an estimated 20,000 people and injured over 100,000 others. It is considered one of the worst industrial disasters in history.