A) If both the assertion and reason are true and reason explains the assertion.
B) If both the assertion and reason are true but reason does not explain the assertion.
C) If assertion is true but reason is false.
D) If assertion is false but reason is true.
Correct Answer: C
Solution :
A hollow metallic closed container maintained at a uniform temperature can act as source of black body radiation. If is also-well-know that all metals cannot act as black body, because if we take a highly metallic polished surface, it will not behave as a perfect black body.
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