If a country charges same rate of taxation from poor as well as rich people, it lacks which of the following characteristics?

Equity

Answer to the question is EQUITY as it means to have the quality of being fair and impartial.

In order to have a proper clarity of the concept, we should be clear about the difference between equity and equality.

Equality means each individual or group of people is given the same resources or opportunities whereas, equity recognizes that each person has different circumstances and allocates the exact resources and opportunities needed to reach an equal outcome.

That means poor people must be given concessions according to their need. Indian taxation follows the principle of equity, where people with less income correspond to a lower tax rate and vice versa.