"Peculiar" does not mean "unique." It means "slightly eccentric" or "strange" or "standing out in an unusual way."
He had a peculiar habit of waking up at 4 a.m. to do his homework. He dressed in a peculiar way: none of his clothes matched.
A large part of getting the comprehension questions right depends on building vocabulary and understanding words and their usage.
The meaning of "individualized" is closer to the meaning of "personal."