The correct answer is option 1, Raja Ram Mohan Roy. Raja Ram Mohan Roy was a prominent social reformer and thinker during the early 19th century in India. He played a significant role in the Bengal Renaissance and is often referred to as the "Father of the Indian Renaissance." One of his important initiatives was the establishment of the Calcutta Unitarian Committee.

The Calcutta Unitarian Committee was formed with the objective of promoting religious and social reforms in Bengal. Unitarianism is a religious movement that emphasizes the unity of God and rejects the concept of the Trinity. The committee aimed to propagate the principles of Unitarianism and promote a rational and progressive understanding of religion. Raja Ram Mohan Roy believed in the importance of reason and rationality in religious matters and wanted to challenge traditional beliefs and practices that he considered to be regressive.

Therefore, it was Raja Ram Mohan Roy who established the Calcutta Unitarian Committee as part of his broader efforts to bring about social and religious reforms in Bengal.