- Statement A is correct: The update of the 1951 NRC in Assam is directly linked to the Assam Accord signed in 1985, which aimed to address the issue of illegal immigrants. - Statement B is correct: The National Register of Citizens is essentially a register containing names of all genuine Indian citizens residing in Assam, as per the defined criteria. - Statement C is correct: The criteria for inclusion in the Assam NRC update largely revolved around establishing presence in Assam up to the midnight of March 24, 1971, and their descendants. - Statement D is incorrect: The NRC process and provisions for registration of citizens are primarily governed by the Citizenship Act, 1955, and the Citizenship (Registration of Citizens and Issue of National Identity Cards) Rules, 2003, as amended. While 1971 is a significant cutoff date, there isn't an Act specifically called "National Register for Citizens Act, 1971".