A man goes 10 km towards East to reach point A and then turns to South and walks 5 km to reach point B. Now he turns in West direction and goes 12 km to reach point C. Finally he turns in North – east direction towards A and goes 11 km to reach point D. What is the distance between A and D?
1
4 km
2
2 km
3
3 km
4
5 km