Assertion (A) : Oxygen plays a key role in the troposphere. Reason (R) : Troposphere is not responsible for all biological activities(a) (i)(b) (ii) (c) (iii) (d) (iv)

Assertion (A) : Oxygen plays a key role in the troposphere. Reason (R

1.	Assertion (A) : Oxygen plays a key role in the troposphere. Reason (R) : Troposphere is not responsible for all biological activities(a) (i)(b) (ii) (c) (iii) (d) (iv)
Answer» Correct answer is (d) (iv)

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Assertion (A) : Oxygen plays a key role in the troposphere. Reason (R) : Troposphere is not responsible for all biological activities(a) (i)(b) (ii) (c) (iii) (d) (iv)

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