Case control study :: (A) Is a prospective study, (B) Gives Odd ratio, (C) Useful in case of rare disease, (D) Both 2 and 3
Answer is D. Case control:

A retrospective study.
Risk factor is to be identified — disease present 
Gives Odds ratio.
Best method to study RARE disease — Case control study.

NESTED Case-control study

It is a case-control study nested within COHORT study. So, it is a prospective study.