Hey there!
Your answer is option C.
This is because a homophone is a word that is pronounced the same, but spelled differently . . .
Synonym - two or more words that have almost the same meaning
Ex: Cold, chilly
Antonym - two or more words that mean the opposite
Ex: Tall, short
Homophones - words that are spelled differently but sound the same
Ex: Know, no
Cognates - words that are spelled the same, put have a different meaning
Ex: Space ( outer space ), Space ( "Give me some space to write on the paper." )
Your answer is a homophone.
Hope this helps you.
Have a great day!