AIPMT 2013 Physics and Chemistry Paper

The resistances of the four arms P,Q,R and S in a Wheatstone's bridge are 10‌ohm,30‌ohm,30‌ohm and 90‌ohm, respectively. The e.m.f. and internal resistance of the cell are 7 volt and 5‌ohm respectively. If the galvanometer resistance is 50‌ohm, the current drawn from the cell will be :-