Which of these can be found only in males?
a. a hypothalamus
b. fsh
c. testicles
d. lh

C. Testicles

Explanation:

It is the germ gland, two male gonads that produce sperm and testosterone, forming the most important part of the male reproductive system. They are located under the penis, between the two muscles, in front of the perineum, being wrapped by a set of covers shaped bags, called scrotum.  The testicles develop inside the abdominal cavity, on each side of the kidneys, which leave and descend the third month of fetal development by dragging the bags that surround them, this process is done through the inguinal canal.  They have a bluish white color, sometimes red when they are full of blood, due to this coloring to the bag that surrounds them. It has an ovoid shape flattened in a transverse direction, of hard consistency, elastic by the fibrous layer that surrounds them.