The correct answer is D. Ropar.
Lothal, Rangpur, and Bhagatrav are all located in modern Gujarat, while Ropar is located in modern Punjab.
Lothal is a well-preserved Indus Valley Civilization (IVC) site located in the Bhal region of Gujarat, India. It is one of the largest IVC sites, and is known for its well-planned layout, sophisticated water management system, and large dock.
Rangpur is an IVC site located in the Kutch district of Gujarat, India. It is a smaller site than Lothal, but is also well-preserved. Rangpur is known for its pottery, which is decorated with geometric patterns.
Bhagatrav is an IVC site located in the Bharuch district of Gujarat, India. It is a small site, but is important because it is one of the few IVC sites that has been excavated extensively. Bhagatrav is known for its copper and bronze artifacts.
Ropar is an IVC site located in the Rupnagar district of Punjab, India. It is a large site, but is not as well-preserved as Lothal, Rangpur, or Bhagatrav. Ropar is known for its fortifications and its large number of wells.