'Only the per capita income can reply the true history of economic development'. Justify the statement.​

The per capita income can not reflect the true state of economic development because if the income of a particular group have increased or have become rich and the income of other groups remain the same, it will reflect an increase in the per capita income.

an aneroid barometer is different from a mercury barometer in that it provides readings that increase as air pressure increases.

hope it : )

i honestly speaking this is too long