The correct answer is option 4, Dayanand Saraswati. Dayanand Saraswati was a 19th-century Indian religious leader and social reformer who founded the Arya Samaj. He advocated for a return to the Vedas, the ancient Hindu scriptures, as a means of finding the true essence of Hinduism and reforming society. Dayanand Saraswati believed that the teachings of the Vedas contained the solutions to the problems faced by society at the time. He promoted the idea of monotheism and denounced polytheistic practices that had crept into Hinduism over time. His call to "Go back to Vedas" was a call to abandon the superstitions and societal inequalities that had developed and to follow the pure teachings of the Vedas.