Step 1: Analyze the statements:
Prabhavati Gupta was the daughter of Chandragupta II, not Chandragupta Maurya. Therefore, statement (i) is incorrect.
Her marriage was to Rudrasena II, a Vakataka ruler, making statement (ii) correct.
As a widow, she issued royal land grants. This demonstrates independent access to resources (statement (iii)) and the act of granting land to people (statement (iv)).