If the reading of the galvanometer For resistances R R3 and R is zero in the shown figure. R4, then: A) the current through R1 is the same as the current through R. B) the current through R2 is the same as the current through R3. C) the current through R3 is greater than the current through R4. D) the current through R: is smaller than the current through R. R R3 R R4