Razia sultana reigned for_______ years?

Razia sultana reigned for_______ years?A. 3
B. 4
C. 5
D. 6

Razia Sultan was born in year 1205 and her ruled the country from 1236-1240. Razia Sultan was the first Muslim woman who was involved in the throne of Delhi. She succeeded her father Shams-ud-din Iltutmish and turned into the Sultanate of Delhi in 1236.