The correct answer is option 1, Chandellas. The Khajuraho temples were built by the Chandella dynasty. The temples are located in Khajuraho, a small town in Madhya Pradesh, India.

The Chandella dynasty was a Hindu dynasty that ruled in central India during the 9th to 13th centuries. They were known for their patronage of art and architecture, and the Khajuraho temples are considered one of their greatest achievements.

The Khajuraho temples are a group of Hindu and Jain temples, known for their intricate carvings and sculptures. They were built over a span of several centuries, starting around the 10th century. The temples were dedicated to various deities and were meant as places of worship and pilgrimage.

The Chandellas were known for their liberal beliefs, as reflected in the explicit and erotic sculptures found in some of the temples. These sculptures are considered to be representations of the celebration of life and love.

In conclusion, the Khajuraho temples were built by the Chandella dynasty, making option 1 the correct answer.