Ravi left home and cycled 10 km towards South, then turned right and cycled 5 km and then again turned right and cycled 10 km. After this he turned left and cycled 10 km. How many kilometers will he have to cycle to reach his home straight?

A.

10 km

B.

15 km

C.

20 km

D.

25 km

Correct answer is B

No explanation has been provided for this answer.