The correct answer is option 1: Kunwar Singh, Tantia Tope, and Nana Saheb.

Kunwar Singh was a prominent leader from Bihar who led an armed rebellion against the British in his region. He played a significant role in inspiring and mobilizing the local population to join the revolt.

Tantia Tope was a general in the rebel army and one of the most important leaders of the rebellion. He led several successful military campaigns against the British and was known for his strategic prowess.

Nana Saheb, also known as Dhondu Pant, was a prominent leader of the revolt and played a crucial role in the initial stages. He led a significant uprising in Kanpur and managed to establish an independent administration for a brief period.

Maulavi Ahmudullah, though a prominent figure during the revolt, did not actively participate in armed resistance against the British. Therefore, option 1 is the correct answer.