The earth's magnetic field at a certain point is $$7.0 \times 10^{-5}$$ T. This field is to be balanced by a magnetic field at the centre of a circular current carrying coil of radius 5.0 cm by suitably orienting it. If the coil has 100 turns then the required current is about

A

28 mA

B

56 mA

C

100 mA

D

560 mA