For measuring depth of a beaker using vernier callipers. Observed readings are given as
`{:(S NO, MSR(cm), VSD),(1, 0.5, 8),(2,0.5,4),(3,0.5,6):}`
If zero error is `-0.03cm`, then mean corrected depth is
A. `0.56 cm`
B. `0.59 cm`
C. `0.53 cm`
D. `0.52cm`