Concept:The Prarthana Samaj was a Hindu reformist movement focused on monotheism and social reform, established in Bombay in 1867.
Explanation:The Prarthana Samaj was founded on 31 March 1867 in Bombay by Dr. Atmaram Pandurang. It aimed to promote worship of one God and reform Hindu society. The movement was inspired by the Brahmo Samaj of Bengal, especially after visits by Keshab Chandra Sen. Unlike the Brahmo Samaj, members saw themselves as reformers within Hinduism, not a new religion. They drew inspiration from Maharashtrian bhakti saints like Namdev and Tukaram. Mahadev Govind Ranade joined in 1870, giving the Samaj a systematic philosophy and wider social agenda. Key reforms included opposing the caste system, promoting women’s education, widow remarriage, and abolishing child marriage. The Samaj established the Widow Remarriage Association (1866), night schools, orphanages, and later the Depressed Classes Mission (1906). Notable leaders included R.G. Bhandarkar and N.G. Chandavarkar. The Samaj published a weekly journal, Subodha Patrika, to spread its message.
Answer:Bombay (Option B)