Identify the feminine form of noun: nephew
a. she-nephew
b. nephewess
c. niece
d. nephewette

Hint: Nephew is a son of one’s brother or sister, or of one’s brother-in-law or sister-in-law. It is a noun used for a male.

Complete answer:
Nephew is a noun used to refer to the son of brother or sister. She-nephew isn’t the justified female form for nephew. Nephewess and nephewette aren’t dictionary words, and just by simply adding -ness or -ette we cannot create a female form for any male word. Hence these options are wrong.
Niece is the female form of the word nephew and refers to the daughter of brother or sister or of one’s brother-in-law or sister-in-law. It’s a deviation from the typical form of converting male to female in English, which is by adding -s or -es.

Example: My niece is a singer in an opera.

Note: Try to identify words which have deviation from the typical conversion rules of male to female.