Q. In the Yaksha Prashna episode of the Mahabharata's Vana Parva, who is revealed to be the Yaksha questioning Yudhishthira? Answer:
Yama-Dharma, the god of death and Yudhishthira's father
Notes: The Yaksha is Yama-Dharma, who tests Yudhishthira's wisdom and righteousness and later blesses the Pandavas.