A Nigerian bank implements an Artificial Intelligence-based fraud detection system that analyses real-time transaction patterns and alerts compliance officers when anomalies are detected. This system is BEST classified as which type of information system?

An AI-based system that applies learned rules and pattern recognition to diagnose anomalies and recommend actions mimics expert human judgment, which is the defining characteristic of an Intelligent Knowledge-Based (Expert) System. A TPS merely records transactions, an MIS produces structured periodic reports, and an OAS supports clerical and administrative tasks — none of these involve expert reasoning or inference engines.