Who among the following established Delhi as the capital of Sultanate?

Who among the following Sultanate rulers was of Afghan origin?

Which of the following places was diamond mining carried out during the Delhi Sultanate period?

Who among the following started ‘Tanka’ silver coin?

Who created the department of Diwan-i-Arz in Delhi Sultanate?

Who amongst the following Sultans built the fifth storey of Qutb Minar?