The correct option is B It started in Naxalbari, Uttar Pradesh in 1967.
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‘Naxalite’ is a designation given to Maoist-oriented and separatist group in India. The Naxalite movement started in Naxalbari, West Bengal in 1967. It was initiated by the poor peasants against the local landlords. This rebellion was suppressed, but it paved its way to different parts of the country. It spread from Naxalbari to Eastern, North-Eastern, Central and Southern parts of India.