Explanation:

Only statements 1&3 are correct.

• Under, the Registration of Births and Deaths (Amendment) Act, 2023, the birth and death database may be used to update the National Population Register, electoral rolls, Aadhaar number, ration card, passport, driving licence, property registration, and such other databases as may be notified. According to the Act, Registrar General of India (RGI) shall maintain the database of registered births and deaths at the national level and it is obligatory upon the Chief Registrars and the Registrars to share the data of registered births and deaths to such a database. 

• The digital birth certificates issued under the Act will become a single document to prove the date of birth for various services, including admission to educational institutions.

Hence option 2nd is correct.