The correct answer is: A. 1934.
The Bihar Socialist Party was established on 15 August 1934. It was founded by a group of young socialist leaders, including Jayaprakash Narayan, Ram Manohar Lohia, and Acharya Narendra Dev. The party’s goal was to achieve socialism through peaceful means. It played a significant role in the Indian independence movement.
The other options are incorrect. Option B, 1932, is the year when the All India Kisan Sabha (AIKS) was founded. Option C, 1931, is the year when the Indian National Congress (INC) adopted the Purna Swaraj resolution. Option D, 1933, is the year when the All India Trade Union Congress (AITUC) was founded.