Let's break down the movements step by step:
1. At dusk, Raman starts by walking facing the sun. Since it is dusk, the sun is in the west. So, Raman is initially walking west.
2. After a while, he meets his friend and both turn to their left.
If Raman was walking west, then a left turn would make him face south.
Both turn left and stop for a while.
3. They start moving again by turning to their right.
If Raman was facing south, a right turn would make him face west again.
4. Finally, Raman waves 'goodbye' to his friend and takes a left turn at a corner.
If Raman was facing west, a left turn would make him face south.
Thus, after the last turn, Raman is now facing south and walking towards the south.