Which one of the following words is not an object of a preposition?

a. pockets

b. cushions

c. afternoon

d. bed

Preposition = links a noun to another word

Example = to, at, after, on, but, etc.

Example Sentence = We went to school on Monday.

Therefore, the answer would be C, afternoon.

Also, afternoon is not an object. It is a noun

Answer: C, Afternoon