List of top Sociology Questions on Varna, Jati and Castes

The logic of Endogamy is:

Which is the commonly cited defining feature of caste?

M.N. Srinivas conducted a village study for the caste system in India, using which of the following concept:

Which of the following is not a feature of caste system?

Give below are two statement: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Caste is endogamous. 
Reason R: Caste forbids its members to marry persons from outside. 
In the light of the above statements, choose the correct answer from the options given below