In the Fourth Episode, what is the Servant's response to Oedipus's questioning? He eagerly answers. He tries to avoid answering. He gets angry and challenges Oedipus. He commits suicide.

The Servant actually answers eagerly by saying that Oedipus is that same baby, who was abandoned by his father and mother - and the herdsman reacts with fear and begs the messenger to hold his tongue. He must be eager and bold to reply in such a way