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Given below are assertion and reason. Po...

Given below are assertion and reason. Point out if both are true and reason is correct explanation (A), both are true but reason is not correct explanation (B), assertion is true but reason is wrong (C ) and both are wrong (D). Assertion. In a tadpole, if thyroid is cut, metamorphosis stops. Reason. TSH is not secreted.

A

a

B

b

C

c

D

d

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states that "In a tadpole, if thyroid is cut, metamorphosis stops." - This is true because the thyroid gland produces thyroxine, a hormone crucial for the metamorphosis of a tadpole into an adult frog. Without the thyroid gland, the production of thyroxine ceases, halting the metamorphosis process. 2. **Understanding the Reason**: - The reason states that "TSH is not secreted." - This is false. The thyroid-stimulating hormone (TSH) is produced by the pituitary gland and is not directly affected by the removal of the thyroid gland. TSH can still be secreted; however, without the thyroid gland, there is no target for TSH to act upon to stimulate the production of thyroxine. 3. **Conclusion**: - Since the assertion is true and the reason is false, the correct option is (C): "Assertion is true but reason is wrong." ### Final Answer: The correct answer is (C) - Assertion is true but reason is wrong. ---
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