- Anil starts by walking 03 km north.
- Then, he turns left (west) and walks 02 km.
- He turns left again (south) and walks 03 km.
- Finally, he turns left again (east) and walks 03 km.
- After walking 03 km east, he is only 01 km away from his starting point in the north-south direction.
Therefore, the correct answer is "01 km."