What is CAA of M 1878?

The CAA, or Citizenship Amendment Act, of 1878 is not a recognized piece of legislation. However, if you're referring to the Citizenship Amendment Act of 2019 in India, it provides a pathway for non-Muslim refugees from certain neighboring countries to acquire Indian citizenship. The act has been controversial and sparked widespread protests, as critics argue it discriminates based on religion. If you meant a different context, please provide more details for clarification.