Who was the last independent Sultan of Bengal?

1. Hussain Shah
2. Ghiyasuddin Mahmud Shah
3. Muscat Shah
4. Ilyas Shah

Answer: Ghiyasuddin Mahmud Shah

Explanation: Sher Shah Suri brought an end to the reign of the last independent Sultan of Bengal, Ghiyasuddin Mahmud Shah, through his demise. Consequently, Sher Shah Suri established Afghan rule in Bengal in the year 1538 CE.