The correct answer is option 1: Colonel Colin Mackenzie. Colonel Colin Mackenzie, a British officer of the East India Company, played a significant role in uncovering the ruins of Hampi. Hampi, located in present-day Karnataka, India, was the capital of the Vijayanagara Empire during the 14th to 16th centuries.

Mackenzie was posted as a British official in South India during the early 19th century. He had a deep interest in archaeology and history, which led him to explore and document various historical sites in the region.

During his tenure, Mackenzie conducted extensive surveys of Hampi and made detailed drawings and maps of the ruins. His documentation efforts were crucial in preserving and understanding the historical significance of the site.

Mackenzie`s work played a pivotal role in bringing the ruins of Hampi to the attention of the wider world, shedding light on the grandeur and architectural marvels of the Vijayanagara Empire. His contributions helped in the subsequent preservation, study, and recognition of Hampi as a UNESCO World Heritage Site.