Answer:
A story about a detective trying to solve a mystery.
Explanation:
Narration has to do with the way a story is told and the devices employed by the narrator to bring life to his narration.
There are two types of narrators:
If a story is being narrated about a detective who is solving a mystery, then it would most likely be told by an unreliable narrator because he can deliberately obscure facts or withhold information in a way to attempting to solve the mystery.