1.

Assertion (A): Derivative control action cannot be used alone.Reason (R): Derivative control action is effective only during transient periods.

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
Answer» B. Both A and R are correct but R is not correct explanation of A


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