Question

The Muscular physique of a male is due to the influence of the Hormone is called
A. Testosterone
B. Estradiol
C. Progesterone
D. Estrone

Answer 1

Hint: The hormone in male body which is known as “sex hormone” ,that is it is responsible for the drive for sex in male is also equally responsible to build their muscles up and several other functions.

Complete step by step answer:
It is a very well known fact that testosterone also know as the sex hormone produces a drive in men for sex. But it is not its only function, the hormone is responsible to perform far more other functions than that.
Testosterone in male body is also responsible for developing the reproductive tissues of male which are testes and prostate. It also results in developing secondary sexual characteristics that are increasing muscle and bone mass, also growing the body hair of males.
There are several other things as well, which is said to be performed by this very hormone. It is essential for health and well-being, osteoporosis is also prevented by it. Decrease in the levels of testosterone which is common in old male results in abnormalities such as fragility and bone loss.
Production of testosterone happens in male's testes, stimulation of testes to produce testosterone is done by another hormone that is luteinising hormone $(LH)$.

Additional information: So what happens when there's an increase and decrease in the hormone.
Increase in testosterone: The abnormal increase of testosterone in man can cause problems like acne, excessive body hair. Increase in sex drive, also in women their is a small amount of testosterone is produced, increase of testosterone in them causes infertility.
Decrease in testosterone:
Now, this count decreases, it results in an increase in body fat, bones get Fragile, body hair decreases etc.
Hence, the correct answer is, ‘A. Testosterone’.

Note: In men testosterone is produced at a peak when they hit puberty. The age interval 18-30 is considered as high levels of testosterone production age, now after 30 the production tends to decrease one percent every year.