Select the option that can be used as a one-word substitute for the given group of words.

A group of three novels or plays, each complete in itself

Trilogy

The correct option is trilogy. It means "a group of three related novels, plays, films, etc., that, although individually complete, are closely related in theme, sequence, or the like." The other options are incorrect.

• Triplet means "one of three children or animals born at the same birth."
• Trivet is an iron tripod placed over a fire for a cooking pot or kettle to stand on.
• Triumvir (in ancient Rome) each of three public officers jointly responsible for overseeing any of the administrative departments.