Final answer:
The correct answer is b. Both the assertion and reason are true, but the reason is not a correct explanation of the assertion.
Step-by-step explanation:
The correct answer is b. Both the assertion and reason are true, but the reason is not a correct explanation of the assertion.
Benzene can indeed react with chlorine in the presence of light to form BHC (Benzene Hexachloride), which is also known as gammexane or 666. However, the reason provided that BHC is also called gammexane or 666 is not a correct explanation of the assertion that benzene reacts with chlorine to form BHC.