20% of the main current passes through the galvanometer. If the resistance of the galvanometer is G, then the resistance of the shunt will be-

30. 20% of the main current passes through the galvanometer. If the resistance of the galvanometer is G, then the resistance of the shunt will be:-
(1) $\frac{\mathrm{G}}{50}$ 
(2) $\frac{\mathrm{G}}{4}$
(3) 50G
(4) 9G