The Arya Samaj is a reform movement within Hinduism that was founded in the late 19th century. It emphasizes the importance of the Vedas (ancient Hindu scriptures) and aims to promote the principles of truth, righteousness, and moral values.

Option 1: The Arya Samaj believes in the existence of God, so this option is not correct.

Option 2: This is the correct answer. The Arya Samaj is against rituals and idol-worship. They promote a simpler form of worship and discourage the use of idols and unnecessary rituals.

Option 3: The Arya Samaj is a reform movement within Hinduism, so they are not against Hinduism. This option is not correct.

Option 4: The Arya Samaj does not oppose Islam specifically, but they have criticized certain practices within the religion. However, this option is not the main focus of their opposition.