The correct answer to the question is option 2: marriage by capture. Rakshasa type of marriage is a traditional Hindu marriage practice where the groom forcefully abducts the bride against her will. In this type of marriage, the consent of the bride is not considered. Historically, this form of marriage was more prevalent during ancient times and it is not widely practiced in modern society.

Option 1, marriage by purchase, is not the correct answer. Although dowry practices have been prevalent in some societies, the concept of buying a bride is not aligned with the Rakshasa type of marriage specifically.

Option 3, marriage by giving dowry, is also incorrect as dowry is not the defining characteristic of Rakshasa type of marriage. Dowry is a practice where the bride`s family provides gifts or valuables to the groom`s family as a form of financial support.

Option 4, marriage by seduction, is not the correct answer either. While seduction may be a part of some marriages or relationships, it is not the defining characteristic of Rakshasa type of marriage.

In summary, the correct answer is option 2: marriage by capture, as the Rakshasa type of marriage involves the groom forcibly abducting the bride without her consent