Reasons for the Birsa movement:

a) Land policies of Britishers:
- The land policies implemented by the Britishers during the colonial period were a major cause of discontent among the indigenous tribes in India, including the Munda tribe to which Birsa Munda belonged.
- The British introduced the Zamindari system, which led to the exploitation of the tribal communities by the zamindars (landlords).
- The tribals were forced to work as bonded laborers on their own lands and were deprived of their traditional rights and customs.
- This oppressive land policy became a significant reason for the Birsa movement as the tribals sought to reclaim their land and resist the exploitative practices.

b) Suppressions by moneylenders:
- The tribal communities, including the Mundas, often fell victim to the exploitative practices of moneylenders who charged exorbitant interest rates.
- The moneylenders took advantage of the poverty and illiteracy prevalent among the tribals and trapped them in a cycle of debt.
- This economic exploitation further deepened the grievances of the tribal people and provided impetus to the Birsa movement, which aimed to challenge the dominance of the moneylenders and demand economic justice.

c) Forceful recruitment in the army:
- This option is incorrect as the forceful recruitment in the army was indeed one of the reasons for the Birsa movement.
- The British actively recruited tribals from Jharkhand and other regions into the army, often forcefully.
- The recruitment process involved coercive tactics, such as kidnapping and deceit, to fill the ranks of the British Indian Army.
- This practice created resentment among the tribal communities, who felt that their young men were being taken away from their families and forced to serve the interests of the colonial power.

d) Activities of missionaries:
- The activities of Christian missionaries in the tribal areas were also a factor contributing to the Birsa movement.
- The missionaries aimed to convert the tribal communities to Christianity and often employed aggressive tactics to achieve their goals.
- The tribals perceived these activities as a threat to their traditional way of life, customs, and beliefs, leading to resistance and the emergence of the Birsa movement.

In conclusion, the correct answer is not option 'C'. The forceful recruitment in the army was indeed one of the reasons for the Birsa movement, along with the land policies of the Britishers, suppressions by moneylenders, and the activities of missionaries.

The Birsa movement identified all these forces as the cause of the misery the Mundas were suffering. The land policies of the British were destroyed. Their traditional land system, Hindu landlords and Moneylenders were taking over their land, and Missionaries were criticising their traditional culture.