Final answer:
The synonym for 'trio' from the given options is 'Trilogy,' as it refers to a set or group of three related things such as literary or artistic works.
Step-by-step explanation:
The word trio is a noun that refers to a group of three people or things. When looking for a synonym for 'trio,' we are seeking another word that has the same or a similar meaning. The options provided are a) Trilogy, b) Disorder, c) Reliability, and d) Jog. The correct synonym for 'trio' from the given options is a) Trilogy, as it also refers to a set or group of three related things, although it is most often used to describe a set of three literary, artistic, or musical works that are connected and can be seen either as a single work or as three individual works.