A marathon route starts and goes 21 km North, then there is a turn towards West where the route goes on for 7 km, then there is a turn towards North where the route goes on for 10 km, then there is a right turn from where the route goes on 7 km to reach the end. Where is ending point with reference to the starting point?
1
31 km South
2
11 km North
3
31 km North
4
11 km South