Which form of social stratification hinges on personal merit?

If your choices are the following:
feudal system
caste system
class system
apartheid or slavery

Then the answer would be caste system . The caste system  is the hierarchy of the roles of the people and that it is based from wealth only.

The correct answer to the following question will be the "Caste system".

Explanation:

A Caste system seems to be the classification of community among different social groups that typically have a structure, is perhaps the hierarchy of people's perspectives, and can be centered exclusively on assets.Social attainment, appearance, profession, as well as educational attainment is one of the variables used to stratify culture across castes.

Therefore, the above is the right answer.