Explanation:

- Brahmo Samaj: Founded by Raja Ram Mohan Roy in 1828. It aimed at reforming Hindu society by fighting social evils like sati and child marriage, and promoting education.

- Arya Samaj: Founded by Swami Dayanand Saraswati in 1875. It advocated for the return to the teachings of the Vedas and opposed idol worship.

- Prarthana Samaj: Established in 1867 in Bombay under the influence of Indian reformer, Keshab Chandra Sen and patterned after the Brahmo Samaj. It sought to reform religious practices in Hinduism.

- Satyashodhak Samaj: Founded by Jyotiba Phule in 1873. It aimed to fight against social discrimination and promote equality.