Who said, ‘One caste, one religion, one God for humankind’?

Shree Narayana Guru

The correct answer is Option (3) → Shree Narayana Guru

The person who said, "One caste, one religion, one God for humankind" was Sri Narayana Guru.

He was a philosopher, social reformer, and spiritual leader from Kerala, India. This quote reflects his core philosophy that aimed to dismantle the social hierarchies and discrimination based on caste within Hinduism.