___ architecture emerged during the Delhi Sultanate
A)Indo-Islamic
B) Indo-European
C) Gandhara
D) Indo-Persian

Hint:
The Delhi Sultanate was a Delhi-based Islamic empire that for 320 years extended over large parts of the Indian subcontinent. The Delhi Sultanate was governed sequentially by five dynasties: the Mamluk/Slave dynasty, the Khilji dynasty, the Tughlaq dynasty, the Sayyid dynasty, and the Lodi dynasty. Parts of India, Pakistan, Bangladesh and some parts of southern Nepal were protected.

Complete Answer:
 Indo-Islamic architecture is an essential type of architecture where, including the Indian aspect of architecture, we can observe a blend of different styles, decorations and structures from Islamic architecture. From the 13th century, when we can observe the Delhi Sultanate era in the history of Medieval India, this distinctive form began to become dominant.
The architecture of the Indian subcontinent, created by and for Islamic patrons and purposes, is Indo-Islamic architecture. Despite an initial Arab presence in Sindh, with the establishment of Delhi as the capital of the Ghurid dynasty in 1193, the development of Indo-Islamic architecture began in earnest. The Delhi Sultanate, a series of Central Asian dynasties which consolidated much of North India, and later the Mughal Empire in the 15th century, succeeded the Ghurids. Persianate, Turkic and Islamic architecture and art styles from Western Eurasia were brought into the Indian subcontinent by each of these dynasties.

Note:
The kinds and types of large buildings expected by the Muslim elites were very different from those previously constructed in India, with mosques and tombs being the most common. Wide domes most frequently topped the exterior of each and made good use of arches.