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Pick up the correct statement from the following : | |
A. | the apparent error on reversal is twice the actual error [Wrong Answer] |
B. | the correction may be made equal to half the observed discrepancy. [Wrong Answer] |
C. | the good results may be obtained from a defective instrument by reversing and taking the mean of two erroneous results [Wrong Answer] |
D. | all the above. [Correct Answer] |