If the zero error correction of a screw gauge with least of count 0.01 mm is +0.05 mm
A. The number of C.S.D is 100 and the zero of the circular scale is 5 divisions above the index line.
B. The number of C.S.D is 100 and the zero of the circular scale is 5 divisions below the index line.
C. the number of C.S.D. Is 50 and the zero of the circular scale is 5 divisions above the index line.
D. Both (1) and (3)
