अब्बासी खलीफा द्वारा औपचारिक रूप से मान्यता प्राप्त करने वाले और 'नासिर अमीर अल-मुminin' की उपाधि के साथ निवेश पत्र (खिलअत) प्राप्त करने वाले पहले दिल्ली सुल्तान कौन थे?

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?