Correct Option: C

Rajasekara's marriage to Avantisundari is an example of 'Anuloma-marriage'. During the Vedic Age, inter-class marriages used to take place in the from of Anuloma marriage. Anuloma marriage is a social practice according to which a boy from upper Varna/Caste/Class can marry a girl from lower Varna/Caste/Class.