Alai Darwaja is a part of which of the following monuments of Mughal architecture? 

Correct option is D

The correct answer is D (Qutub Minar, Delhi).

Explanation:

• The Alai Darwaza is the southern gateway to the Quwwat-ul-Islam Mosque in the Qutub Minar complex, Delhi.
• It was built by Sultan Alauddin Khalji in 1311 CE.
• It is significant as the first building in India to employ Islamic architectural principles of accurate construction and geometric ornamentation, featuring the first "true dome" in the country.

Information Booster:

• Material: It is constructed of red sandstone and decorated with white marble inlays, creating a striking color contrast typical of the period.
• Architectural Style: It showcases the Seljuk style of architecture, characterized by its horseshoe-shaped arches and intricate latticework (jali).
• Inscription: The doorway contains inscriptions in Naskh script praising Alauddin Khalji.

Additional Knowledge:

• Taj Mahal, Agra: A masterpiece of Mughal architecture built by Shah Jahan; its main gateway is called the Darwaza-i-rauza.
• Red Fort, Delhi: Built by Shah Jahan; its primary entrance is the Lahori Gate, and the secondary is the Delhi Gate.
• Red Fort, Agra: An earlier Mughal fort built primarily by Akbar; its most famous gate is the Amar Singh Gate (originally Delhi Gate).