The least count of a vernier calipers is 0.025 mm . If the 12th division of the vernier scale coinciles with a main scale division and the zero of the vernier scale is to the right of the zero of the main scale then the zero error is `"______"`
A. `+0.3 cm`
B. `+0.03`
C. `+0.12 mm`
D. None of the above
