The correct answer is: A. Niyoga
Niyoga is a type of marriage in ancient India in which a widow could marry the younger brother of her deceased husband. This was done to ensure that the deceased husband’s line would continue. The practice of niyoga was common in the Rig Vedic period, but it declined in later periods.
Prajapatya is a type of marriage in which the bride is given away by her father to the groom. This is the most common type of marriage in Hinduism.
Daiva is a type of marriage in which the bride is given away by her father to the groom in exchange for a gift.
Arsha is a type of marriage in which the bride is given away by her father to the groom in exchange for a promise of protection.
Niyoga is different from these other types of marriage in that it is not a permanent marriage. The widow is only married to the younger brother of her deceased husband until she has a child. After that, she is free to marry someone else.
Niyoga was a controversial practice in ancient India. Some people believed that it was a way to keep the deceased husband’s line alive, while others believed that it was a way to exploit widows. The practice of niyoga declined in later periods, but it is still practiced in some parts of India today.