The correct answer is D. Patan.
Rani ki vav is a stepwell located in Patan, Gujarat, India. It was built in the 11th century by Queen Udayamati, wife of King Bhimdev I of the Solanki dynasty. The stepwell is a UNESCO World Heritage Site and is one of the most popular tourist attractions in Gujarat.
The stepwell is a rectangular structure with a depth of 30 meters. It is built on a stepped platform and has a total of 103 steps. The stepwell is decorated with intricate carvings and sculptures. The main entrance to the stepwell is flanked by two large pillars. The pillars are decorated with carvings of elephants, lions, and other animals.
The stepwell is a popular tourist attraction and is a must-see for anyone visiting Patan. It is a beautiful and well-preserved example of 11th century architecture.
Option A is incorrect because Bharuch is a district in Gujarat, India. Rani ki vav is located in Patan, which is a different district.
Option B is incorrect because Amreli is a district in Gujarat, India. Rani ki vav is located in Patan, which is a different district.
Option C is incorrect because Bhavnagar is a district in Gujarat, India. Rani ki vav is located in Patan, which is a different district.