Read the passage given below and answer the following question .
India’s Demographic Transition
Census data from India (i.e., Registrar of India) suggests that population growth is on the decline since 1991. The average number of children a woman expected was 3.8 in 1990, and this has fallen to 2.7 children per woman today (Bloom, 2011). Even though the fertility and population growth rates are declining, India’s population is projected to increase from 1.2 billion today to an estimated 1.6 billion by 2050 due to population momentum. Population momentum refers to a situation, where a large cohort of women of reproductive age will fuel population growth over the next generation, even if each woman has fewer children than previous generations did. Additionally, the drop in Crude Death (CDR) and Birth Rates (CBR) for the past four decades indicates that India is progressing towards a post-transitional phase. From 1950 to 1990, the drop in CBR was less steep than the drop in the CDR. However, during 1990s, the decline in CBR has been steeper than the decline in CDR, which has resulted in reduced annual population growth rate of 1.4% today.

Census is conducted in India by________.

Ministry of Home Affairs