What was the first indian region to be incorporated into the islamic world

Gujarat

Explanation:

This region is located on a strategic trade routes that allowed traders from Arab territory to come. During the trades , cultural and knowledge exchange occurred between the two cultures. Over time, Islam started brought over by the Arabian Traders started to gain popularity in this region.

This can be proven by looking at the existence of  The Barwada Mosque which established in this region before.

do all equestions have to be answered

answer; an active listener;