The correct answer is: A. Rs. 91,772
Per capita income is the average income earned by each person in a country. It is calculated by dividing the total income of the country by the total population. The per capita income of Chhattisgarh for the year 2016-17 was estimated at Rs. 91,772 at constant prices of 2011-12. This means that, on average, each person in Chhattisgarh earned Rs. 91,772 in 2016-17, in terms of the purchasing power of money in 2011-12.
Option A is the correct answer because it is the only option that is consistent with the data provided. Option B is incorrect because it is the per capita income of Chhattisgarh for the year 2015-16. Option C is incorrect because it is the per capita income of Chhattisgarh for the year 2017-18. Option D is incorrect because it is the per capita income of India for the year 2016-17. Option E is incorrect because it is not a valid option.