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These questions consist of two statement...

These questions consist of two statements each,printed as Assertion and Reason.While answering these questions you are required to choose any one of the following four responses.
Assertion:Oxygen dissociation curve of haemoglobin is sigmoid.
Reason:Oxygen dissociation curve moves toward left side with increase in `CO_2` concentration in the air.

A

A. If both Assertion and Reason are true and Reason is correct explanation of Assertion

B

B. If both assertion and Reason are true but reason is not correct explanation of Assertion

C

C. If Assertion is true but Reason is false.

D

D. If both Assertion and Reason are false.

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