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Assertion (A): Veins have thick walls to...

Assertion (A): Veins have thick walls to collect blood from different organs.
Reason (R): Blood in veins are not under pressure.

A

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

B

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

C

A is true but R is false.

D

A is false but R is true.

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