Solution:Human Development Index (HDI) was created to emphasize that people and their capabilities should be the ultimate criteria for assessing the development of a country, not economic growth alone. Since year 2010 new method have been adopted to calculate HDI, which includes 3 indicators:1. Life Expectancy Index - (Life Expectancy at birth)
2. Education Index-Knowledge Index(TEL)
(i) Mean years of schooling
(ii) Expected years of schooling
3. Standard of Living (Income/GNI Index-GNI per capita at purchasing power parity: PPPS) ma
The HDI is the geometric mean of the above three indices. It is noteworthy that earlier (before 2010) living standard was estimated through per capita Gross Domestic Product (based on PPP $) but later on, it was replaced with per capita Gross National Income (based on PPPS).
It is clear that at the question period, option (b) was the correct answer but at present all options are wrong.