Assertion :The person with diabetes insipidus feels thirsty. Reason: A person with diabetes insipidus suffers from excess secretion of vasopressin.

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 C Assertion is correct but Reason is incorrect.
Assertion is correct, as person with diabetes insipidus feels thirsty and passes more urine.
Reason is incorrect, as vasopressin or antidiuretic hormone is secreted by posterior pituitary gland and the deficiency of vasopressin results in a disorder, known as diabetes insipidus.
Therefore, the correct answer is option C.

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