मंगोल सेनापति तमर खान (तैमूर खान) के घातक आक्रमण से सीमा की रक्षा करते समय सुल्तान गयासुद्दीन बलबन के किस पुत्र की मृत्यु हो गई थी?

Which of the following agricultural land taxes was collected during the Delhi Sultanate?

Which Sultan was criticized by chronicler Ziyauddin Barani for appointing low-born and non-aristocratic people such as cooks, barbers, and gardeners to high administrative posts?