Which abbreviation is used for detectives in law enforcement?

The abbreviation used for detectives in law enforcement is generally recognized as "DI", which stands for Detective Inspector in various police organizations, particularly in the United Kingdom. This title signifies a rank within the police force that involves investigative responsibilities. Detectives, in general, are law enforcement officers who investigate crimes and gather facts to solve cases, and the abbreviation indicates their specialized role.

The other options do not typically represent detectives within law enforcement contexts. For instance, "DC" might refer to Detective Constable, a lower rank, while "DE" and "DQ" are not standard abbreviations associated with detective roles. This highlights the importance of knowing the specific terminology and abbreviations used within the law enforcement community.