Assertion: Diabetes insipidus is marked by excessive urination and too much thirst of water.

Reason: Anti–diuretic hormone (ADH) is secreted by the posterior lobe of pituitary gland.

Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

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

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Assertion is true statement but Reason is false.

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Both Assertion and Reason are false statements.

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Solution

The correct option is B
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.

Diabetes insipidus (DI) is a condition characterized by large amounts of dilute urine and increased thirst. The amount of urine produced can be nearly 20 liters per day. Reduction of fluid has little effect on the concentration of the urine. Complications may include dehydration or seizures.
Diabetes insipidus is due to a lack of the hormone vasopressin (antidiuretic hormone, ADH). This can be due to damage to the hypothalamus or pituitary gland or genetics.

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