MCQ
$A$ : During evolution the early time period was without ozone layer.
$R$ : Ozone layer absorbs $U.V.$ rays to some extent.
$R$ : Ozone layer absorbs $U.V.$ rays to some extent.
- AAssertion and Reason both are correct and also correct explanation.
- ✓Assertion and Reason both are correct but not explanation of assertion.
- CAssertion is correct, but Reason is incorrect.
- DBoth Assertion and Reason are incorrect.