One day Rajesh left home and cycled 10 km southwards, and then he turned right and cycled 5 km; again he turned right and cycled 10 km. Then again he turned left and cycled 10 km to reach point P. How many kilometers will he have to cycle to reach his home straight from point P?

A

25 km

B

20 km

C

10 km

D

15 km