The resistances of the four arms P, Q, R and S in a Wheatstone's bridge are `10Omega, 30Omega, 30Omega` and `90Omega`, respectively. The emfs and internal resistances of the cell are 7V and `5Omega` respectively. If the galvanometer resistance is `50Omega`, the current drawn from the cell will be

Options

A. `1.0 A`
B. `0.2 A`
C. `0.1 A`
D. `2.0 A`

Answer

B