With reference to the Indian History, Alexander Rea, A. H. Longhurst, Robert Sewell, James Burgess and Walter Elliot were associated with

Alexander Rea, A. H. Longhurst, Robert Sewell, James Burgess, and Walter Elliot were all associated with archaeological excavations in India.

• Alexander Rea: A British archaeologist who worked mainly in South India. He is known for unearthing a sarcophagus from Pallavaram in Tamil Nadu.
• Albert Henry Longhurst: A British archaeologist and art historian who worked in India and Ceylon. He was the Superintendent of the Southern Circle, Archaeological Survey of India, and was in charge of the systematic digging of Nagarjunakonda. He also served as the Archaeological Commissioner, Archaeological Survey of Ceylon.
• Robert Sewell: Worked in the civil service of the Madras Presidency and was the Keeper of the Madras Record Office. He specialized in the Vijayanagara Empire and undertook archaeological work, including at the Buddhist stupa at Amaravati.
• Walter Elliot: Visited Amaravati and collected several sculpture panels, which came to be called the Elliot marbles. He concluded that the structure at Amaravati was one of the largest and most magnificent Buddhist stupas ever built.

Hence, option A is the correct answer.