Explanation:

The Dhanuyatra of Odisha's Bargarh district is a famous drama festival associated with a particular incarnation of Lord Vishnu. Here's an explanation of the options:

- Option 1: Lord Rama

- Lord Rama is the protagonist of the epic Ramayana. He is the seventh incarnation (avatar) of Vishnu. Festivals like Ramlila are dedicated to him.

- Option 2: Lord Vamana

- Lord Vamana is the fifth incarnation of Vishnu. He appeared as a dwarf Brahmin to subdue the demon king Bali.

- Option 3: Lord Varaha

- Lord Varaha is the third avatar of Vishnu. He took the form of a boar to rescue Earth from the demon Hiranyaksha.

- Option 4: Lord Krishna

- Correct Answer: The Dhanuyatra festival is dedicated to Lord Krishna. It depicts and celebrates his life and the destruction of the demon king Kansa.