Option 1: Buddhu Bhagat and Jhindari Manaki were not leaders of the Indigo Revolt. They are not associated with any significant historical event.

Option 2: Digambar Biswas and Bishnu Biswas were indeed the leaders of the Indigo Revolt. The Indigo Revolt, also known as the Nilbidroha or Blue Rebellion, took place in Bengal in the late 19th century. The Biswas brothers were indigo farmers who played crucial roles in organizing and leading the revolt against the exploitative practices of the British indigo planters. The revolt aimed to protest against the oppressive indigo cultivation system that forced farmers to grow indigo instead of food crops and subjected them to poverty and hardships.

Option 3: Dinabandhu Mitra and Madhusudan Datta were prominent figures in Bengali literature and social reform movement but were not directly involved in the Indigo Revolt.

Option 4: Birsa Munda and Gaya Munda were tribal leaders who revolted against the British colonial rule during the late 19th century, but they were not leaders of the Indigo Revolt.

Therefore, the correct answer is option 2, Digambar Biswas and Bishnu