Detail explanation..

Assertion : Secreting hypotonic urine is effective in reducing urinary loss of water.

Reason : Hypotonic urine is more concentrated and higher in osmotic pressure than the blood. 

a) Assertion is True, Reason is True, Reason is correct explanation for Assertion
b) Assertion is True, Reason is True; Reason is NOT a correct explanation for Assertion
c) Assertion is True, Reason is False
d) Both the Assertion and Reason are False.

Dear Student,


Option D is correct. Both the Assertion and Reason are false.

Hypotonic solution is the solution in which the concentration of water is more than the solutes. While Mammals secrete hypertonic solution as urine which is more concentrated than the blood to reduce the loss of water from the body.

Regards,

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