Explanation:

The Ramakrishna Mission is a Hindu religious and spiritual organization which forms the core of a worldwide spiritual movement known as the Ramakrishna Movement or Vedanta Movement. It was founded by Swami Vivekananda, a chief disciple of the 19th-century saint Ramakrishna Paramahamsa, on May 1, 1897. Options (2) Ishwar Chandra Vidhyasagar, (3) Dayanand Saraswati, and (4) Raja Rammohan Roy were also prominent social and religious reformers in India, but they founded other organizations (e.g., Arya Samaj by Dayanand Saraswati, Brahmo Samaj by Raja Rammohan Roy).