The correct answer is: D. All of the above.
Chahar Qutub is a complex of four tombs located in Hansi district of Haryana, India. The tombs are dedicated to Jalal-ud-din, Bahar-ud-din, Qutub-ud-din, and their wives. The complex was built in the 14th century by the Tughlaq dynasty.
The tomb of Jalal-ud-din is the largest and most impressive of the four tombs. It is a square structure with a dome and four minarets. The tomb is decorated with intricate stone carvings.
The tomb of Bahar-ud-din is smaller than the tomb of Jalal-ud-din, but it is still an impressive structure. It is a square structure with a dome and two minarets. The tomb is decorated with simple stone carvings.
The tomb of Qutub-ud-din is the smallest of the four tombs. It is a square structure with a dome and no minarets. The tomb is decorated with simple stone carvings.
The tombs of Chahar Qutub are an important example of Tughlaq architecture. They are a reminder of the rich history of Hansi district.