 
			 
			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 | |