Given below are two statements: one is labelled Assertion(A) and other is labelled Reason(R).
Assertion (A): Mantle cavity is present between visceral hump and mantle layer in Pinctada.
Reason (R): In Pinctada, excretory organs are absent.
In the light of above statements, choose the correct answer from the options given below.

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

Both A and R are false

A is true, but R is false

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

answer is C.

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Detailed Solution

Metanephridia are the excretory structures in molluscs.

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