The correct answer is: d) Champaner.
Champaner was the capital of the Vaghela dynasty from the 12th to the 15th centuries. It was a major center of trade and culture, and its ruins are now a UNESCO World Heritage Site.
Patan was the capital of the Gujarat Sultanate from the 14th to the 16th centuries. It is now a major city in Gujarat, India.
Junagadh was the capital of the Kathiawar Sultanate from the 16th to the 19th centuries. It is now a major city in Gujarat, India.
Dholka was a major city in Gujarat during the Vaghela dynasty. It is now a small town in Gujarat, India.