Assertion (A) - Puberty is the age at which individuals attain reproductive maturity.Reason (R) - In boys, puberty occurs at younger age than girls.(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) A is false but R is true.4. Assertion (A) - Thyroxine is called flight and fight hormone.Reason (R) - Thyroxine helps the body to regulate metabolism of carbohydrates, fats and proteins.(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) A is false but R is true.
Question
Assertion (A) - Puberty is the age at which individuals attain reproductive maturity.Reason (R) - In boys, puberty occurs at younger age than girls.(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) A is false but R is true.4. Assertion (A) - Thyroxine is called flight and fight hormone.Reason (R) - Thyroxine helps the body to regulate metabolism of carbohydrates, fats and proteins.(a) Both A and R are true and R is the correct explanation of A.(b) Both A and R are true but R is not the correct explanation of A.(c) A is true but R is false.(d) A is false but R is true.
Solution
For the first question, the correct answer is (c) A is true but R is false. Puberty is indeed the age at which individuals attain reproductive maturity. However, it is not true that boys reach puberty at a younger age than girls. In fact, girls generally reach puberty earlier than boys.
For the second question, the correct answer is (d) A is false but R is true. Thyroxine is not the 'flight and fight' hormone; that term is usually used to describe adrenaline. However, it is true that thyroxine helps the body to regulate the metabolism of carbohydrates, fats, and proteins.
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