Q. Who formed the secret group "Krantiveer" after the 1857 Revolt in Kali Kumaon?
Answer: Kalu Mahara
Notes: Kalu Singh Mahara led the formation of "Krantiveer," a secret group opposing British rule in Kali Kumaon post-1857. He organized armed followers called Bandukchi who conducted ambushes against the British, disrupting colonial control in the area.