Option a is the correct answer. Hampi: This is an archaeological site located in Karnataka, near the modern-era city of Hosapete. It was the capital of the Vijayanagara Empire in the 14th century and contains some of the finest specimens of ancient Indian art and architecture. Nagarjunakonda: This is a historical town, now an island located near Nagarjuna Sagar in Guntur district of Andhra Pradesh, near the state border with Telangana. It is one of India's richest Buddhist sites, and now lies almost entirely under the lake created by the Nagarjuna Sagar Dam. It was named after the Buddhist philosopher Nagarjuna, who lived here in the 2nd century CE. Shishupalgarh: This is an ancient fortified city situated in Khurda district of Odisha, near Bhubaneswar. It dates back to the 7th century BCE and was one of the largest and best preserved early historic fortifications in India. It is identified with Kalinganagara of Kharavela and Tosali of Ashoka. Arikamedu: This is an archaeological site in Puducherry, in Kakkayanthope, Ariyankuppam Commune. It was a major trading port between India and Rome from the 2nd century BCE to the 8th century CE. It has yielded many artifacts such as amphorae, glassware, coins, beads, and lamps that attest to the cultural exchange between the two civilizations.