Who among the following founded Arya Samaj in 1875?

The correct answer is Option 1- Swami Dayanand Saraswati.

Swami Dayanand Saraswati was a Hindu reformer and the founder of Arya Samaj in 1875. He was born in Gujarat, India, in 1824. He was a scholar of the Vedas and other Hindu scriptures. He was also a strong critic of social ills such as caste discrimination and superstition.

Arya Samaj is a Hindu reform movement that promotes the principles of monotheism, social equality, and education. It is one of the largest Hindu reform movements in India.