Assertion: Carbon dioxide in air is necessary for sustaining life. Reason: Carbon dioxide is assimilated in carbohydrates in photosynthesis
Options
(a)if A and R both are correct and R is the correct explanation of A
(b)if A and R both are correct but R is not the correct explanation of A
(c)if A is correct and R is incorrect
(d)if A is incorrect and R is correct
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