Step 1: Background of the play.
Girish Karnad's Hayavadana (1971) is one of the landmarks of modern Indian theatre. It combines folk theatre techniques with myth and modern philosophy.
Step 2: Trace the sources. \begin{itemize} \item Somadeva's Kathasaritsagara: Contains the original Sanskrit tale of "The Transposed Heads," where two men's heads are interchanged, raising philosophical questions of identity and body-soul dualism. \item Thomas Mann's The Transposed Heads (1940): A novella based on the same Sanskrit tale; Karnad explicitly acknowledged its influence. \end{itemize}
Step 3: Rule out other options. - Valmiki's Ramayana: A classical epic but unrelated to Hayavadana. - Franz Kafka's The Metamorphosis: Also deals with transformation, but thematically unrelated to Karnad's sources. \[ \boxed{\text{Correct Answer: (A) and (C)}} \]

| a | Phileas Fogg and Jean Passepartout | i | William Shakespeare |
| b | Don Quixote and Sancho Panza | ii | Jules Verne |
| c | Candide and Pangloss | iii | Miguel de Cervantes |
| d | Dogberry and Verges | iv | Voltaire |