Consider the decadal Census data given below: Decadal Population (in millions) Population 1961 10.7 1971 14.3 1981 16.2 1991 18.9 The above data refer to which one of the 'Population by Religion' Groups?

1. The question presents decadal Census data showing population in millions for a specific religious group: 10.7 (1961), 14.3 (1971), 16.2 (1981), 18.9 (1991). 2. We need to identify which 'Population by Religion' Group matches this data. 3. Checking the Census of India data for religious communities around those decades: - Sikhs population was roughly: 10.3M (1971), 13.0M (1981), 16.2M (1991). - Jains population was much smaller: ~2.6M (1971), ~3.2M (1981), ~3.3M (1991). - Christians population was roughly: 14.2M (1971), 16.1M (1981), 19.6M (1991). - Buddhists population was roughly: 3.8M (1971), 4.7M (1981), 6.3M (1991). 4. The provided data (14.3M in 1971, 16.2M in 1981, 18.9M in 1991) closely matches the population figures for Christians in India during that period.