Who was the founder of 'Hindustan Socialist Democratic Union' ?

The question is based on the UPPSC Prelims 2022 examination. The name 'Hindustan Socialist Democratic Union' (HSDU) is a less common designation found in specific historical accounts, such as those by Srikrishan Saral, to refer to the revolutionary group that eventually formed or became part of the Hindustan Socialist Republican Association (HSRA) in 1928. According to the official answer key provided by the commission, the founders associated with this organization are Yateendranath, Ajay Ghosh, and Phanindranath Ghosh.

• Yateendranath (Jatin Das): A prominent revolutionary who died in 1929 after a historic 63-day hunger strike in Lahore Jail.
• Ajay Ghosh: A key member of the HSRA who later became the General Secretary of the Communist Party of India (CPI).
• Phanindranath Ghosh: An early member of the HSRA who later became a government approver in the Lahore Conspiracy Case.

While individuals like Sacheendra Sanyal (founder of HRA) and Gopen Chakravartee (Communist leader) were also central to the revolutionary movement of that era, the specific trio in Option B is the recognized answer for this question.