The correct answer is A. Santhal.
Sohrai is the biggest festival of the Santhal tribe. It is a harvest festival that is celebrated in the month of November. The festival marks the end of the agricultural year and the beginning of the new year. It is a time for thanksgiving and for celebrating the abundance of the harvest.
The festival is celebrated with great pomp and show. There are feasts, dances, and music. The people of the Santhal tribe dress up in their traditional attire and decorate their houses with flowers and leaves. They also offer prayers to the gods and goddesses for a good harvest in the coming year.
Sohrai is a time for family and friends to come together and celebrate. It is a time for joy and happiness. It is a time to forget the troubles of the past year and to look forward to the new year with hope and optimism.
The other options are incorrect because they are not the biggest festival of the corresponding tribe.
- Tharu: The biggest festival of the Tharu tribe is Maghi. It is a harvest festival that is celebrated in the month of January.
- Gond: The biggest festival of the Gond tribe is Hareli. It is a harvest festival that is celebrated in the month of August.
- Oraon: The biggest festival of the Oraon tribe is Karma. It is a harvest festival that is celebrated in the month of December.