A small workshop receives 230 V mains through a single fuse in the live wire before the wiring splits into two branches. One branch feeds four identical lamps rated 60 W each (connected in parallel), and the other feeds a drilling machine rated 920 W. Which fuse rating is most appropriate to safeguard the installation without unnecessary blowing during normal operation?
a) 3A
b) 10A
c) 6A
d) 5A