The correct answer is: a) Vadodara.
Vadodara is a city in Gujarat, India, that is known for its solar panel manufacturing. The city is home to a number of solar panel manufacturing companies, including Vikram Solar, Waaree Energies, and Moser Baer Solar. These companies produce a variety of solar panels, including monocrystalline, polycrystalline, and thin-film panels.
Surat is a city in Gujarat, India, that is known for its textile industry. The city is home to a number of textile mills, as well as a number of companies that manufacture solar panels. However, Surat is not as well-known for its solar panel manufacturing as Vadodara.
Rajkot is a city in Gujarat, India, that is known for its diamond industry. The city is home to a number of diamond cutting and polishing factories, as well as a number of companies that manufacture solar panels. However, Rajkot is not as well-known for its solar panel manufacturing as Vadodara.
Gandhinagar is the capital of Gujarat, India. The city is home to a number of government offices and institutions, as well as a number of companies that manufacture solar panels. However, Gandhinagar is not as well-known for its solar panel manufacturing as Vadodara.