Explanation:

Recently, the Registrar General of India released data related to birth rate, death rate and infant mortality rate in its Sample Registration System (SRS) bulletin for 2018. The data provided that the national birth rate in 2018 stood at 20 and death & infant mortality rates stood at 6.2 and 32 respectively. As against the national infant mortality rate (IMR) of 32, Madhya Pradesh has an IMR of 48 and Nagaland 4. Infant mortality is the number of deaths of children under one year of age per 1000 live births. The SRS is a demographic survey for providing reliable annual estimates of infant mortality rate, birth rate, death rate and other fertility and mortality indicators at the national and sub-national levels. Hence all statements are correct.