Razia Sultan, the first woman to sit on the throne of Delhi, was the daughter of which Sultan

Answer: Option C

Iltutmish became the first sultan to appoint a woman as his successor when he designated Razia as his heir apparent. However, after Iltutmish died on 30 April 1236, Razia's half-brother Rukn ud-din Firuz was elevated to the throne instead.