The correct answer is: A. Amreli
Amreli district has the largest number of sawmills in Gujarat. As of 2018, there were 1,200 sawmills in the district, employing over 20,000 people. The sawmills in Amreli district are mostly concentrated in the talukas of Rajula, Dhari, and Amreli. The main reason for the large number of sawmills in Amreli district is the abundance of forest resources in the area. The district is home to several forests, including the Gir Forest National Park, which is the only home of the Asiatic lion. The forests in Amreli district provide a steady supply of timber to the sawmills in the area.
The sawmills in Amreli district are engaged in the processing of timber into various products, such as sawn timber, plywood, and veneer. The sawmills in the district are an important source of employment and income for the people of Amreli district.
The other options are incorrect because they do not have the largest number of sawmills in Gujarat.
Option B: Bhavnagar district has 900 sawmills.
Option C: Kheda district has 600 sawmills.
Option D: Patan district has 400 sawmills.