The correct answer is B. Mishing.
The Mishing people are an ethnic group native to the Brahmaputra Valley in Assam, India. They are one of the largest tribes in Assam, with a population of over 1.5 million. The Mishing people are known for their rich culture and traditions, which include a number of festivals. One of the most important festivals of the Mishing people is Ali-Aai-Ligang, which is an agro-based festival that celebrates the beginning of the agricultural season. The festival is held in the month of April or May, and it is a time for the Mishing people to give thanks to the gods for the blessings of the previous year and to pray for a good harvest in the coming year.
The festival is marked by a number of rituals and ceremonies, including the sacrifice of animals, the offering of prayers, and the singing of songs. The Mishing people also dress up in traditional costumes and dance and feast during the festival. Ali-Aai-Ligang is a time for the Mishing people to come together and celebrate their culture and traditions. It is also a time for them to give thanks to the gods for the blessings of the previous year and to pray for a good harvest in the coming year.
The other options are incorrect because they are not tribes of Assam that celebrate an agro-based festival called Ali-Aai-Ligang. The Khasis are an ethnic group native to the Khasi Hills in Meghalaya, India. The Naga are an ethnic group native to the Naga Hills in Nagaland, India. The Bodo are an ethnic group native to the Bodoland Territorial Areas District in Assam, India.