1.  A boy rode his bicycle Northward, then turned left and rode 1 km and again turned left and rode 2 km. He found himself 1 km west of his starting point. How far did he ride northward initially?
A. 1 km
B. 2 km
C. 3 km
D. 5 km

Answer: Option B

Explanation:

The boy rode 2 km. Northward.