Dussehra, also known as Vijay Dashmi, is a major Hindu festival celebrated in India. It marks the victory of good over evil and is associated with the epic Ramayana. While options a), b), and d) are correct statements about Dussehra, option c) is incorrect. Let's explore each statement in detail:

1. People celebrate the victory of Ram over Ravan: Dussehra is celebrated to commemorate the triumph of Lord Ram over the demon king Ravan. According to Hindu mythology, Ravan had kidnapped Lord Ram's wife, Sita, and held her captive in his kingdom of Lanka. Lord Ram, along with his brother Lakshman and the monkey god Hanuman, fought a great battle against Ravan and his army to rescue Sita. On the tenth day of the battle, Lord Ram finally defeated Ravan, symbolizing the victory of good over evil.

2. It is also called Vijay Dashmi: Dussehra is commonly referred to as Vijay Dashmi, which means "the tenth day of victory." This name signifies the triumph of Lord Ram over Ravan on the tenth day of the battle. The festival is celebrated with great enthusiasm and joy throughout India.

3. Effigies of Ravan and Meghnad are burnt by people: This statement is incorrect. The burning of effigies of Ravan and his family members, including Meghnad, is a significant ritual associated with Dussehra. These effigies are typically made of hay and other combustible materials. On the day of Dussehra, these effigies are set on fire, symbolizing the destruction of evil forces. This ritual is performed in open grounds and is witnessed by large crowds.

4. It is marked with enactments of Ramlila: Dussehra is often celebrated with the enactment of Ramlila, which is a dramatic reenactment of the story of Lord Ram. Ramlila performances take place in various parts of India during the nine nights leading up to Dussehra. Professional actors and local volunteers participate in these performances, which depict the life and adventures of Lord Ram. On the final day of Dussehra, the Ramlila culminates with the portrayal of Lord Ram's victory over Ravan.

In conclusion, option c) is incorrect because the burning of effigies of Ravan and Meghnad is an integral part of Dussehra celebrations, rather than being an incorrect statement about the festival.