Discussion
Assertion (A) : The use of Chlorofluorocarbons is banned throughout the world nowadays.
Reason (R) : These chemicals cause skin cancer.
Answer: C
Correct answer: A is true but R is false.
CFCs have been phased out under the Montreal Protocol, so A is true. But they do not themselves cause cancer: they destroy stratospheric ozone, and it is the extra ultraviolet reaching the ground that raises the risk of skin cancer. R is false as a direct reason.
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