During the 17th century, the Portuguese controlled maximum trade in the western coastal region. The Portuguese were the first European power to arrive in India and establish trade routes along the western coast. They established trading posts and forts, and had a strong presence in regions such as Goa, Daman, and Diu. Their control over the trade in spices, textiles, and other valuable commodities gave them significant influence and wealth. The Dutch, who arrived later, did establish their own trading posts and had some trade presence in the region, but it was the Portuguese who had the maximum control over trade during this time. The other options, the house of Jagat Seth and Mulla Abdul Gaffar, do not have historical evidence to suggest that they controlled maximum trade in the western coastal region during the 17th century.