Question

Assertion :Females have less stature than males after puberty. Reason: This happens because of the presence of hCG in the blood of females.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

Males have more stature than females because of the action of male sex hormone-testosterone which is secreted by testis in males. Body starts secreting testosterone from the age of puberty. Its secretion is under the influence of Luteinising Hormone (LH) of the anterior lobe of pituitary gland. Testosterone controls the development of secondary sexual characters in males like hoarseness of voice, development of facial hairs, bone growth, calcium retention, the closing of epiphyseal cartilage The total quantity of bone matrix increases. The pelvic outlet is narrowed and lengthened. The strength of the pelvic bones increases to carry more loads. That is why males have more stature than females after puberty when this hormone is present in the blood. HCG (Human Chorionic Gonadotropin) is the hormone secreted by human placenta during pregnancy. HCG enlarges the corpus luteum in the mother's ovary and stimulates it to secrete progesterone.

So the correct answer is 'Assertion is correct but Reason is incorrect'.