The correct answer is (a) Sahariya.
The Sahariya are a tribal people who live in the Indian states of Rajasthan and Madhya Pradesh. They are a very poor and marginalized community, and many of them live in extreme poverty. Deepawali is a major festival for many Hindus, but the Sahariya do not celebrate it. They believe that Deepawali is a day of mourning, because it is the day that their ancestors were killed by the Mughals.
The Baga are a tribal people who live in the Indian state of Assam. They are a very small community, and there is very little information about them. However, it is known that they do not celebrate Deepawali.
The Paharia are a tribal people who live in the Indian states of Jharkhand, Bihar, and West Bengal. They are a very large community, and there is a lot of information about them. However, it is not known whether or not they celebrate Deepawali.
The Tharu are a tribal people who live in the Indian states of Uttar Pradesh, Uttarakhand, and Madhya Pradesh. They are a very large community, and there is a lot of information about them. They do celebrate Deepawali, but they do it in a different way than most Hindus. They believe that Deepawali is a time to celebrate the harvest, and they do not light any firecrackers or candles.