Q. Pandavas lived incognito under which king during 13th year of exile?
Answer: King Virata of Matsya
Notes: Pandavas spent their 13th year of exile incognito in King Virata's Matsya kingdom, disguised as servants, as detailed in the Vana Parva and Virata Parva of Mahabharata. This period was crucial before the Kurukshetra War to fulfill their exile conditions.