PURPORT

All the inquisitiveness of Maharaj Yudhisthira about the world situation were already conjectured by Maharaj Yudhisthira on the basis of Lord Krishna's disapearance from the vision of the world and this was now disclosed by him on account of acute dejection of Arjuna which could not have been possible without such untoward situation. So even though he was doubtful about it, he was obliged to enquire frankly about it from Arjuna on the basis of Sri Narada's indication.