When the metallic body of an electric iron is properly earthed, what will happen if the live wire accidentally touches the body?
(a) A large current flows to earth, blowing the fuse and making the appliance safe
(b) No appreciable current flows because the earth wire is assumed to have infinite resistance, so the iron works normally
(c) The body rises to 220V but earthing limits the shock to a harmless level, so it can still be used
(d) The live current is diverted to the neutral wire instead of earth, so only a small leakage occurs and the fuse remains intact