Which of the following statements are correct
(i) Accuracy is the closeness with which an instrument approaches the true value as the quantity being measured.
(ii) Precision is a measure of reproducibility of the measurement.
(iii) Precision of an instrument can be improved upon by calibration.
(iv) Accuracy may be specified in terms of limiting error.
i, ii, iv only
ii, iii, iv only
i, iii, iv only
i, ii, iii only
Option 1 : i, ii, iv only