With reference to medieval Indian rulers, which one of the following statements is correct?

Q. With reference to medieval Indian rulers, which one of the following statements is correct?

 (a) Alauddin Khilji first set up a separate Ariz’s department

(b) Balban introduced the branding system of horses of military

(c) Muhammad bin Tughlaq was succeeded by his uncle to the Delhi throne

(d) Firoz Tughlaq set up a separate department of slaves

Ans: (d) Firoz Tughlaq set up a separate department of slaves

Explanation: Firoz Shah Tughlaq established a department for slaves which was called ‘Diwan-i-Bandagan. Muhammad-bin- Tughlaq’s cousin Firoz Shah Tughlaq succeeded him to the throne. Alauddin Khilji introduced the branding system of horses in his military. So only option D is correct.