The correct answer is that Vidushaka, a common character in Sanskrit drama, is invariably a Brahmana. The Vidushaka character is typically depicted as a Brahmana, which is the highest varna or caste in the traditional Indian caste system. The Vidushaka serves as a witty and humorous companion to the main characters in the drama, often providing comic relief and commentary on the events unfolding on stage.

Thank you for pointing out the mistake, and I apologize for any confusion caused. The correct answer is indeed: Vidushaka, a common character in Sanskrit drama, is invariably a Brahmana.