Analog Electronics - Engineering

Q1:

Assertion (A): A good op-amp should have very large band width Reason (R): An ideal op-amp should have infinite input resistance and zero output resistance

A Both A and R are correct and R is correct explanation for A

B Both A and R are correct but R is not correct explanation for A

C A is correct R is wrong

D A is wrong R is correct

ANS:A - Both A and R are correct and R is correct explanation for A

Can anyone explain? I think correct answer is (B).