The correct answer is: None of the above.
Arya Samaj was founded in 1875 by Swami Dayanand Saraswati in Bombay. It is a Hindu reform movement that aimed to revive the Vedic religion and to promote social reform. The Arya Samaj has branches all over India and in many other countries.
Chaudhary Ram Narayan Bhagan was a social reformer and freedom fighter from Sonipat district of Haryana. He was born in 1869 and died in 1945. He was a member of the Indian National Congress and was actively involved in the freedom struggle. He was also a member of the Arya Samaj and worked for the upliftment of the downtrodden.
Pt. Shambhu Dutt was a scholar and educationist from Sonipat district of Haryana. He was born in 1872 and died in 1947. He was a professor of Sanskrit at the Panjab University, Lahore. He was also a member of the Arya Samaj and worked for the spread of education.
Both Chaudhary Ram Narayan Bhagan and Pt. Shambhu Dutt were great men who made significant contributions to the society. However, they were not the founders of the Arya Samaj.