Whar is the main criterion used by the world bank is classifying different countries as rich and poor countries?What are the limitations of this criterion?

Explanation

World bank classifies the whole globe as a rich or poor country.World bank works on the basis od average income or per capita income of the partucular contry to be declared as poor or rich.Any country to be declared as poor or rich.Any country having more than or equal to 45,3000 per annum in the year 2004 is classifed as a rich country and less than or equal to 37000 per annum is called a low-income country or a poor country.
Limitation:
(i)They use per capita income to classify but if hides dispaties like two country may have equitable distribution .In other country ,it may be possible that most of citizens are poor while very few of them are extermely rich.
(ii)More income can not always ensure a good quality of life.freedom,equality ensyre a good quality of life.Freedom,equality and equal opportunities are necessary for the same.