Assertion :Failure of secretion of hormone vasopressin, causes diabetes mellitus in the patient. Reason: Vasopressin increases the volume of urine by increasing the reabsorption of water from the urine.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is D Both Assertion and Reason are incorrect.
Failure of secretion of hormone vasopressin causes diabetes insipidus. Diabetes mellitus is a disease, which is caused due to the failure of insulin hormone secretion by the pancreatic islets.
Vasopressin or antidiuretic hormone (ADH) reduces the volume of urine by increasing the reabsorption of water from the urine in the distal convoluted tubules, collecting ducts in the kidney and do not increase the volume of urine. Hence, option D is correct.

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