Assertion (A): In simplifying block diagram the product of transfer functions in feed forward direction must remain the same.Reason (R): In simplifying block diagram the product of transfer functions around a closed loop must remain the same.

• A. Both A and R are correct and R is correct explanation of A
• B. Both A and R are correct but R is not correct explanation of A
• C. A is correct but R is wrong
• D. R is correct but A is wrong