The correct option is B Only III
The Bhopal gas tragedy is known as one of the world's worst industrial disasters. It was India’s first major industrial disaster. The tragedy occurred when around 45 tons of methyl isocyanate leaked out from the Union Carbide India Ltd.’s (UCIL’s) pesticide factory in the city of Bhopal on December 2-3, 1984.
Thus, statement I is incorrect.
The gas leakage turned the entire city into a colossal gas chamber as methyl isocyanate (MIC) is highly reactive to heat. It was estimated that this disaster killed 15,000-20,000 people.
Thus, statement II is incorrect.
Some of the health issues that were experienced by the affected individuals immediately after the accident include ulcers, respiratory issues, persistent abdominal pain, etc.
Some long-term effects that have become prominent in the population are increased chronic conjunctivitis, decreased lung function and increased chromosomal abnormalities, etc.
Thus, statement III is correct.