At which place Iltutmish was appointed as governor for the first time?

Iltutmish appointed his first Subedar in Bihar to :

For the first time the token currency was introduced in India by :

The Horse-Shoe arch was first introduced in the

In which year Iltutmish got recognition from the Caliph of Baghdad?

Which Sultan of Delhi was the first to charge ‘Ghari’ or House-tax?