One morning, after sunrise, P and Q were talking to each other face to face. If Q's shadow fell exactly to P's right, then which direction was P facing?
Correct: B
In the morning, after sunrise, the sun is in the East. Therefore, all shadows fall towards the West.
Q's shadow fell exactly to P's right. This means P's right side is West (where the shadow is).
If P's right side is West, then P must be facing South (because if you face South, West is to your right and East is to your left).
If P is facing South, then Q, who is face to face with P, must be facing North.