

MCQOPTIONS
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1. |
Assertion (A): In echinoderms, water vascular system helps in excretionReason (R): In echinoderms excretory system is absent |
A. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
B. | Both (A) and (R) are true and (R) is not correct explanation of (A) |
C. | (A) is false but (R) is true |
D. | (A) is true but (R) is false |
Answer» D. (A) is true but (R) is false | |