Which of the following materials was not primarily used in the construction of the Qutub Minar?

The correct option is Granite.

Explanation

The Qutub Minar is a quintessential example of early Indo-Islamic architecture, specifically representing the style of the Mamluk (Slave) and Tughlaq dynasties. Its construction history spans multiple rulers, leading to the use of distinct materials in different storeys.

Material Analysis:

• Red Sandstone: This is the predominant material used in the construction of the minaret. The first three storeys are constructed almost entirely of red sandstone.
• Marble: The upper storeys (the fourth and fifth) exhibit a mix of marble and sandstone. These were largely the result of repairs and additions made by Firoz Shah Tughlaq after the minaret was damaged by lightning.
• Buff Sandstone: Alongside red sandstone, buff (yellowish) sandstone was utilized in the architectural detailing and upper sections of the Qutub complex structures.
• Granite: Granite was not a primary construction material for the Qutub Minar. The intricate carvings and fluting typical of the minaret required softer stones like sandstone and marble, rather than the extremely hard granite typically found in South Indian temple architecture.

Key Takeaway: The Qutub Minar is primarily composed of red sandstone in its lower storeys and a combination of marble and sandstone in its upper storeys.