Concept:A trilogy refers to a group of three related works, especially dramatic or literary works, with a connected theme or story.Explanation:The term is commonly used for three plays written by one author and designed to be performed or studied as a set.They are often related in subject, characters, or events, and may be presented in separate parts.The correct meaning among the options is that a trilogy is a sequence of three plays written by the same author.Answer:B. sequence of three plays written by the same author.