Which among the following socio religions community was founded by Raja Ram Mohan Roy?

Correct option is A

The correct answer is (a) Brahmo Samaj.
 Raja Ram Mohan Roy founded the Brahmo Samaj in 1828. It was a monotheistic religious reform movement that aimed to purify Hinduism and remove its many social evils. The Brahmo Samaj believed in the worship of a single God, and rejected the caste system, sati, and child marriage.
 The Prarthana Samaj was founded in 1867 by Mahadev Govind Ranade. It was a similar movement to the Brahmo Samaj, but it was more focused on social reform than religious reform.
 The Arya Samaj was founded in 1875 by Swami Dayanand Saraswati. It was a Hindu revivalist movement that rejected many of the beliefs and practices of modern Hinduism.
 The Akali Dal is a Sikh political party that was founded in 1920. It is not a religious reform movement.
So the answer is (a) Brahmo Samaj.