Q. Hasan Nizami, a Persian language poet and historian, served in the court of which sultan of the Delhi Sultanate?
Answer: Qutb al-Din Aibak
Notes: Hasan Nizami was a renowned Persian language poet and historian serving in the court of Sultan Qutb al-Din Aibak of the Delhi Sultanate in the 12th and 13th centuries. His notable work, Tajul-Ma'asir, was the first official history of the Delhi Sultanate. Nizami migrated from Nishapur to Delhi owing to political instability in his native region. Recognized for his intellectual prowess and fine literary style, Nizami found considerable favor in the sultan’s court. His work remains a significant resource for historians researching the early history of the Delhi Sultanate.