Assertion: The dietary deficiency of iodine causes goitre.
Reason: Iodine is required for the formation of thyroid hormone.

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

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If both Assertion and Reason are correct but the Reason is not the correct explanation of Assertion.

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If Assertion is correct but Reason is incorrect.

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If Assertion is incorrect but Reason is correct.

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Solution

The correct option is B
If both Assertion and Reason are correct but the Reason is not the correct explanation of Assertion.

The correct option is (B):
Explanation of the assertion statement:
Goitre is a disorder associated with the swelling of the thyroid gland.
It is caused due to lower concentration of iodine in the diet.
Explanation of the reason statement:
The thyroid gland produces an important hormone called thyroxine.
Iodine is required for the synthesis of thyroxine.
Hence, when the quantity of iodine is less in the diet, an adequate amount of thyroxine is not produced.
Final answer:
If both Assertion and Reason are correct but the Reason is not the correct explanation of Assertion.

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