Question

The stage when the reproductive organs reach sexual maturity is called as
A. Puberty
B. Menstruation
C. Gestation
D. Fertilisation

Answer 1

Hint: The thyroxine hormone and the somatotropic hormone regulate growth toward the end of childhood and during puberty. The thyroid gland produces the thyroxine hormone, which is one of the thyroid hormones, and the somatotropic hormone is also known as human growth hormone.
These hormones aid in bone elongation, nutrition production, cell differentiation, and overall body development.
Somatotropic hormones are protein hormones that aid in the regulation of human and animal growth, cell division, and reproduction.

Complete answer:
Option A: Puberty refers to the physical changes that occur as a child's body matures into an adult capable of sexual reproduction and conception. Hormonal signals from the brain are sent to the gonads, or reproductive organs, which are the ovaries in females and the testes in males.
So, option A is correct.
Option B: Menstruation is a woman's monthly loss of the endometrial layer, which occurs when the discharged ovum is not fertilised.
So, option B is not correct.
Option C: Between conception and birth, gestation is the process of carrying an embryo in the womb of a viviparous animal.
So, option C is also not correct.
Option D: Fertilization is the process of male and female gametes fusing together.
So, option D is not correct.

So, option A is the correct answer.

Note:

ADOLESCENCE	PUBERTY
Adolescence is a time of psychological and social transformation that occurs between the ages of \[10\] and \[19\].	Puberty is the physical shift that occurs during adolescence. It usually starts at \[11\] years old for girls and \[12\] years old for males.
It is a long-term condition that usually coincides with puberty but is distinct from it.	It can start and cease before or after adolescence.
It is defined in terms of psychological, mental, and sexual maturity, as well as the ability to make decisions. An adult is a completely matured adolescent.	It is described in physiological terms such as pubic hair growth, male voice hoarseness, muscular growth, breast development, perspiration and sebaceous gland development, and so on.
Practical apprehension and social maturity are required for its acquisition.	It is obtained through the use of hormones such as testosterone in men and oestrogen in women.