Explanation:

- Option 2: Brahmo Samaj

- Founded by Raja Ram Mohan Roy in 1828.

- Aimed at reforming Hindu society and promoting monotheism.

- Opposed idol worship and the caste system.

- Option 1: Arya Samaj

- Founded by Swami Dayanand Saraswati in 1875.

- Promoted Vedic teachings and values.

- Advocated for social reform and education.

- Option 3: Akali Dal

- Founded in the early 20th century, not by Raja Ram Mohan Roy.

- Associated with Sikh political and religious reform.

- Option 4: Prarthana Samaj

- Founded by Atmaram Pandurang in 1867 in Bombay.

- Focused on social reform within Hindu society.