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Assertion (A) : Cretinism is a condition which affects adults causing dwarfism and mental retardation. Reason (R): Cretinism is a kind of hypothyroidism. This disease occurs due to the defective

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Question

Assertion (A): Cretinism is a condition which affects adults causing dwarfism and mental retardation.

Reason (R): Cretinism is a kind of hypothyroidism. This disease occurs due to the defective development, or early atrophy (degeneration), of the thyroid.

  1. A is True and R is False.
  2. A is False and R is True.
  3. Both A and R are True.
  4. Both A and R are False.

Options

  • (1)

  • (2)

  • (3)

  • (4)

MCQ
Assertion and Reasoning
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Solution

(2)

Explanation:

Cretinism affects children, not adults. It results from severe deficiency of thyroid hormones during early development and may cause stunted physical growth and intellectual disability. Therefore, the Assertion (A) is false.

Cretinism is a form of hypothyroidism caused by defective development or early degeneration of the thyroid gland. Therefore, the Reason (R) is true.

Hence, A is false and R is true.

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Chapter 12: The Endocrine System - Review Questions [Page 172]

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Selina Concise Biology [English] Class 10 ICSE
Chapter 12 The Endocrine System
Review Questions | Q A. 15. | Page 172
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