- A. Arya Samaj was started in 1875 by Swami Dayanand Saraswati. This statement is correct. Arya Samaj was founded by Swami Dayanand Saraswati in Bombay in 1875 with the aim of reforming Hindu society based on the Vedas. - B. Vivekananda condemned rituals and superstitions. This statement is correct. Swami Vivekananda, a disciple of Ramakrishna Paramahansa and founder of the Ramakrishna Mission, preached a practical Vedanta and emphasized service to humanity. He was critical of blind faith, meaningless rituals, and superstitious practices prevalent in society. - C. The theosophists advocated the revival and strengthening of Hinduism. This statement is correct. The Theosophical Society, founded by Helena Blavatsky and Henry Steel Olcott, had a strong interest in Eastern religions, including Hinduism. Annie Besant, who later led the Indian section, actively promoted the study of Hindu scriptures, defended its principles, and contributed to a sense of pride in Indian heritage, aligning with revivalist sentiments. - D. In 1920s, Akali Movement was started to purify Sikh Gurudwaras in Punjab. This statement is correct. The Akali movement (also known as the Gurudwara Reform Movement) in the early 20th century aimed to liberate Sikh shrines (Gurudwaras) from the control of corrupt hereditary priests (Mahants) and bring them under the management of an elected body of Sikhs, leading to the passage of the Sikh Gurdwaras Act in 1925.