Correct Answer: (c) Christians
Solution:The above data refer to Christians population among the given 'Population by Religion' groups. As per 1991 Census, the total population of Christians in the country was 18.9 million, which was 2.25 percent of the total population of that time. According to the Census 2011, the population of Chris- tians in India is approximately 27.8 million, which accounts for 2.3 percent of the total population.