Easy
$Assertion :$ $A$ hollow metallic closed container maintained at a uniform temperature can act as a source of black body radiation.
$Reason :$ All metals act as black bodies.
$Reason :$ All metals act as black bodies.
- AIf both $Assertion$ and $Reason$ are correct and the $Reason$ is a correct explanation of the $Assertion$.
- BIf both $Assertion$ and $Reason$ are correct but $Reason$ is not a correct explanation of the $Assertion$.
- CIf the $Assertion$ is correct but $Reason$ is incorrect.
- DIf both the $Assertion$ and $Reason$ are incorrect.
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