Prove your Citizenship :
It is granting every individual citizenship.
CAA:
It is granting citizenship to the people who are religious minority of Myanmar via Bangladesh, Pakistan and Afghanistan. It excludes Muslims.
NPR :
This process is for everyone irrespective of caste, religion or region. This is state wide exercise.
It is a survey on finding out the socio-economic background of every individual by noting down their parents name, Aadhar number, Passport numbers, etc. It is a door to door survey by each state government.
NRC :
This process is for everyone irrespective of caste, religion or region. This is State wise exercise.
It is granting citizenship after making all of ones documents like pan card, passport, Aadhar, Voting Card invalid . It asks every individual to provide proof of having stayed in a particular state before 1947 or 1971.
Due to land reforms in 1970s, many lost their land, house and some people gained it. None of the Indian States have any computer record of land ownership before Independence to now. Only Telangana has done it recently and it took them 4 years.
What if one can't prove ?
One will be marked as illegal migrant & asked to go to the Foreign Tribunal set up by GOI. If one can't prove or provide relevant documents then they maybe sent to Detention Center.