Indian Culture:18-Family and Marriage

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1.
Which of the following tribes has the Matriarchical system?
2.
Which one of the following can be classified as a “Pratiloma Marriage”?
3.
Which source states that man is by himself is only half-man and his second half is the wife?
4.
One can enter the grihastha ashram only after.
5.
In which literary source it is mentioned that wife is the very source of the purusharth, not only of dharma, kama and Martha but even of moksha?