Assertion (A): Secondary instruments require calibration at frequent intervals.Reason (R): Secondary instruments have many errors.

Both A and R are true but R is not correct explanation of A

Both A and R are true and R is correct explanation of A

Assertion (A): Secondary instruments require calibration at frequent

1.	Assertion (A): Secondary instruments require calibration at frequent intervals.Reason (R): Secondary instruments have many errors.
A.	Both A and R are true and R is correct explanation of A
B.	Both A and R are true but R is not correct explanation of A
C.	A is true R is false
D.	A is false R is true
Answer» B. Both A and R are true but R is not correct explanation of A