निम्नलिखित में से किसने कहा था कि 'मुहम्मद-बिन-तुगलक देवगिरि को अपनी राजधानी बनाना चाहता था क्योंकि यह साम्राज्य के केंद्र में स्थित था'?

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?