The Bihar Kisan Sabha was a peasant organization founded in 1929 in Bihar, India. It played a significant role in the peasant movement and agrarian struggles during the colonial period. The correct answer to the question is option 'E', none of the above.

The Bihar Kisan Sabha was primarily associated with the leadership of Swami Sahajananda Saraswati. Swami Sahajananda was a prominent social and political leader who worked tirelessly for the welfare of peasants and the upliftment of the rural poor. He was the driving force behind the formation and growth of the Bihar Kisan Sabha.

The Bihar Kisan Sabha's primary objective was to address the grievances and issues faced by the peasants in Bihar. It aimed to fight against exploitative agricultural practices, unfair land revenue policies, and landlordism. The Sabha also sought to provide a platform for peasants to voice their concerns and collectively fight for their rights.

The Kisan Sabha organized various campaigns, protests, and movements to address the issues faced by the farmers. It played a pivotal role in mobilizing peasants and raising awareness about their rights and entitlements. The Sabha also worked towards promoting agricultural reforms, improving access to credit and inputs, and ensuring fair prices for agricultural produce.

Under the leadership of Swami Sahajananda, the Bihar Kisan Sabha became a powerful organization that gained widespread support among the peasant communities in Bihar. It played a significant role in the broader peasant movement in India and collaborated with other peasant organizations and political parties to address the agrarian issues at the national level.

In conclusion, the Bihar Kisan Sabha was primarily associated with Swami Sahajananda Saraswati, a prominent social and political leader. It played a crucial role in the peasant movement and agrarian struggles in Bihar and fought for the rights and welfare of the peasants.