The correct answer is: Diamond Cutting & Polishing.
Surat is a city in Gujarat, India, and is known as the “Diamond City” because of its diamond cutting and polishing industry. The city is home to over 100,000 diamond workers, and accounts for over 90% of the world’s diamond cutting and polishing industry.
The textile industry is also a major employer in Surat, with over 500,000 workers. The city is known for its production of cotton textiles, and is one of the largest textile manufacturing centers in India.
The petrochemical industry is a smaller employer in Surat, with over 10,000 workers. The city is home to a number of petrochemical plants, which produce a variety of products, including gasoline, diesel, and fertilizer.
The shipbuilding industry is a very small employer in Surat, with only a few hundred workers. The city has a shipyard, which builds and repairs ships, but the industry is not a major employer in the city.
In conclusion, the diamond cutting and polishing industry is the major employer in Surat. The textile industry is also a major employer, while the petrochemical and shipbuilding industries are much smaller employers.