Option c is the correct answer. Humayun's Tomb is a 16th-century mausoleum that was built by the Mughal emperor Akbar for his father Humayun. It is considered to be the first example of Mughal architecture, which was influenced by both Persian and Indian styles. Persian influence: Humayun's Tomb has a symmetrical plan with a central octagonal chamber surrounded by four smaller chambers. The tomb is built of red sandstone and white marble, and is decorated with intricate carvings and inlay work. The tomb is set in a large garden divided into four parts by water channels, which is a typical feature of Persian gardens. Indian influence: The tomb reflects some Indian features, such as the small kiosks or chhatris on the roof, which are common in Hindu temples. The red sandstone and white marble were also materials that were used in the 14th century architecture of the Delhi Sultanate.