Which of the following term is linked with the concept of "Poverty line", in the pre-independence era?

Consumption expenditure Small landholding Calorie intake Jail cost of living

Jail cost of living

Dadabhai Naoroji used the menu for a prisoner and used appropriate prevailing prices to arrive at what may be called the ‘Jail cost of living’ to discuss the concept of the poverty line, in pre-independent India.