- A) Veerappa, the Zamindar of Koppal rose against the Nizam of Hyderabad in 1819: While Veerappa Naik of Koppal is more famously associated with the 1858 rebellion against the British in the post-1857 period, there were instances of resistance in the region earlier. However, compared to statement D, this is less definitively wrong or potentially refers to a lesser-known event. - B) Gadkaris were military classes who garrisoned Maratha forts: This is a correct statement. Gadkaris were hereditary custodians of Maratha forts and were involved in revolts when their rights were threatened by British policies. - C) Chakra Bisoi was the Khond leader: This is a correct statement. Chakra Bisoi was a prominent leader of the Khond uprisings in Odisha in the mid-19th century, protesting against British attempts to suppress the Meriah sacrifice and introduce new taxes and administration. - D) Sindhu and Kanhu were the leaders of the Kols: This is an incorrect statement. Sidhu and Kanhu Murmu were the main leaders of the Santhal Rebellion of 1855-1856. The Kol Rebellion took place earlier (1831-1832) and was led by figures like Buddhu Bhagat.