Who took the first detailed photographs of archaeological remains at…

The correct answer is Option (4) → Alexander Greenlaw

Option (1) John Marshall — Incorrect. Conservation of the site began under John Marshall in 1902, decades after the first photographs.

Option (2) Colin Mackenzie — Incorrect. Colin Mackenzie visited Vijayanagara in 1800, long before photographs were taken there. He was the first to survey the site.

Option (3) J.F. Fleet — Incorrect. J.F. Fleet began documenting the inscriptions on the temple walls in 1876.

Option (4) Alexander Greenlaw — Correct. Alexander Greenlaw took the first detailed photographs of the remains at Hampi in 1856.