Sperm formation produces
a. four diploid cells
b. four haploid cells
c. four polar bodies
d. two haploid cells

The correct answer is option B. "four haploid cells".

Explanation:

Sperm, also known as spermatozoa, is produced by a special type of cellular reproduction called spermatogenesis. Spermatogenesis is a subtype of meiosis, at which a diploid parent cells divided its genetic material in half, and produces four haploid cells. Spermatogenesis starts with a mitotic division of spermatogonial stem cells, then type B cells differentiate into spermatocytes. Later, spermatocytes divide into two secondary spermatocytes and finally, four haploid spermatids are produced in the last stage.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.