What is distance between ‘A’ and ‘B’?

Rama travels a distance of 5 km from a place ‘A’ towards North, turns left and walks 3 km, again turns right and walks 2 km and finally turns right and walks 3 km to reach the place ‘B’. what is the distance between ‘A’ and ‘B’ ?

1. 7 km
2. 13 km
3. 2 km
4. 10 km