In layman terms - Difference between NPR, NRC and the CAB - Assam controversy

Citizenship Amendment Bill (CAB) - This bill is an amendment to the Citizenship Act, 1955 and it tends to grant citizenship to Hindu, Sikh, Buddhist, Jain, Parsi and Christian immigrants from Pakistan, Bangladesh and Afghanistan who have illegally migrated into India. Since the Muslim community has been left out, the bill also violates Article 14 of the Constitution through religious discrimination. Additionally the bills also seek to reduce the citizenship eligibility period from 11 years to 6 years. ASSAM AND CAB controversy -

The Union Government is planning to introduce the Citizenship Amendment bill (CAB) before implementing the National Register of Citizens (NRC). However, in Assam, the NRC is already implemented. If the bill becomes an Act, the NRC prepared in Assam would be nullified.

Since Assam is under constant threat of illegal immigration, the state of Assam has erupted into protest against CAB. The tribes of Assam are not against any community but are against illegal immigration