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Q.

Given below are statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : Frogs and lizards exhibit incomplete double circulation.

Reason (R) : In frogs and lizards, the heart is three chambered.

In light of the above statements, choose the correct answer from the options given below.

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a

A is true but R is false. 

b

A is false but R is true. 

c

Both A and R are true but R is not the correct explanation of A.

d

Both A and R are true and R is the correct explanation of A. 

answer is D.

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Detailed Solution

In frogs and lizards, the heart is three-chambered (with two atria and one ventricle), so the oxygenated and deoxygenated blood gets mixed in the ventricle. Thus, they exhibit incomplete double circulation. 

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Given below are statements. One is labelled as Assertion (A) and the other is labelled as Reason (R).Assertion (A) : Frogs and lizards exhibit incomplete double circulation.Reason (R) : In frogs and lizards, the heart is three chambered.In light of the above statements, choose the correct answer from the options given below.