In collaboration with David Hare and Alexander Duff, who of the following established Hindu College at Calcutta ?

Raja Rammohan Roy was the principal Indian collaborator in establishing Hindu College, supporting David Hare’s efforts to found the institution in 1817 and working with other reformers and educators in its creation [1]. Contemporary accounts note Roy’s active assistance to Hare and his wider educational initiatives (including an English school and later Vedanta College), which situate him as a founding force behind Hindu College [2]. By contrast, Henry Louis Vivian Derozio was associated with the college later as a brilliant young teacher (appointed in 1826) and leader of the radical student group, not as its founder [3]. Thus the correct answer is Raja Rammohan Roy.

Sources

1. [1] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 9: A General Survey of Socio-Cultural Reform Movements > Raja Rammohan Roy's Efforts at Social Reform > p. 208
2. [2] Modern India ,Bipin Chandra, History class XII (NCERT 1982 ed.)[Old NCERT] > Chapter 7: Social and Cultural Awakening in the First Half of the 19th Century > MODERN INDIA > p. 127
3. [3] Modern India ,Bipin Chandra, History class XII (NCERT 1982 ed.)[Old NCERT] > Chapter 7: Social and Cultural Awakening in the First Half of the 19th Century > MODERN INDIA > p. 128