Option c is the correct answer. Pair 1 is correctly matched- Lothal is an ancient city located in Gujarat, India. It was a major port city during the Indus Valley Civilization. The ruins of Lothal include an ancient dockyard, which is one of the earliest known dockyards in the world. Pair 2 is correctly matched- Sarnath is a town in Uttar Pradesh, India. It is a major Buddhist pilgrimage site. The Buddha gave his first sermon in Sarnath, after his enlightenment. The ruins of a Buddhist stupa and monastery can be found in Sarnath. Pair 3 is incorrectly matched- The lion capital of Ashoka is located in Sarnath. Pair 4 is correctly matched- Nalanda is a town in Bihar, India. It was a major center of learning during the Gupta Empire. Nalanda University was a famous center of Buddhist learning. The ruins of Nalanda University can be found in Nalanda.