Q 1744634553.    

AIIMS 2009

Assertion : The primitive atmosphere was reducing one i.e., without oxygen.

Reason : In the primitive atmosphere, oxygen was involved in forming ozone layer.

A Both A and R individually true and R is the correct explanation of A
B Both A and R are individually true but R is not the correct explanation of A
C A is true but R is false
D A is false but R is true

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