Human Development Index measured on the basis of three broad parameters. These are

a) Per capita income, school enrollment and child mortality
b) Purchasing power parity, educated adults and infant mortality
c) Real per capita income, Level of education and Life expectancy at birth
d) Gross national income, literacy rate and life expectancy at birth

Ans- c

Explanation

A HDI is an index that ranks the countries into four tiers of human development.  This index was developed by Amartya Sen and Mahbub ul haq. It is composite index which is made from 3 indexes, these are:

1. Life expectancy at birth
2. Education index=Mean years of scholing+expected years of schooling
3. GNI per capita

In the question it is asking about broad parameters.

Real per capital income is = Nominal income-inflation

This nominal income is GNI