The correct answer is option 3, the Khajuraho group of temples. UNESCO is an organization that designates sites around the world as World Heritage Sites in order to preserve and protect their cultural or natural significance. The Khajuraho group of temples, located in Madhya Pradesh, India, is one such site that has been recognized by UNESCO. These temples were built between the 9th and 12th centuries and showcase exquisite artwork and intricate sculptures. The temples are known for their depiction of various aspects of life, including spirituality, love, and mythology. The recognition by UNESCO highlights the importance of these temples in Indian history and culture. Options 1, 2, and 4 are not approved UNESCO World Heritage Sites.