- Statement i is correct because exogamy (marrying outside one's kin group) was indeed a common practice among high-status families for forming alliances and preventing close kin marriages.
- Statement ii is incorrect as the Manusmriti outlined eight forms of marriage, not just one. These included various types that reflected different societal values.
- Statement iii is correct as it accurately represents the practice of women adopting their husband's gotra upon marriage, highlighting the patrilineal norms of the society.
- Statement iv is incorrect. The Dharmasutras prescribed specific roles for each varna, with Brahmanas primarily tasked with religious and educational duties, not agriculture and trade, which were assigned to Vaishyas.
Therefore, the correct options are those including statements i and iii, making the answer Option A.