Who were called 'Dastar-Bandan' ?

Who among the following were famous for their metal-casting skills and used to cast excellent matchlocks during the medieval period?

Tughril Khan raised a standard of revolt during whose reign?

Who founded the 'Khalsa'?

The Muslim ruler whose empire was regarded as a part of Dar-ul-Islam was

Who was the real founder of Turk rule in Bihar?