Explanation:

? Swapnavasavadattam is a Sanskrit play in six acts written by the ancient Indian poet Bhasa. It was written during the Gupta period. The plot of the drama is drawn from the romantic narratives about the Vatsa king Udayana and Vasavadatta, the daughter of Pradyota, the ruler of Avanti, which were contemporary to the poet's time. Hence option (c) is the correct answer. ? The main theme of the drama is the sorrow of Udayana for his queen Vasavadatta, believed by him to have perished in a fire, which was actually a rumour spread by Yaugandharayana, a minister of Udayana to compel his king to marry Padmavati, the daughter of the king of Magadha. It forms, in context, a continuation of his another drama, Pratijnayaugandharayana.