Who amongst the following Generals of Alauddin Khalji, ultimately became the first Sultan of Tughluq dynasty?

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

Who among the following Sultanate rulers was of Afghan origin?

Who was the last ruler of the Tughluq dynasty of the Delhi Sultanate?

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

Who among the following opposed the power of the Khalifa?