[Answer] Which of the following is NOT an example of anomaly?

Which of the following is NOT an example of anomaly?

In data analysis anomaly detection (also outlier detection) is the identification of rare items events or observations which raise suspicions by differing significantly from the majority of the data. Typically the anomalous items will translate to some kind of problem such as bank fraud a structural defect medical problems or errors in a text.. Anomalies are also referred to as outliers …

A global anomaly is the quantum violation of a global symmetry current conservation. A global anomaly can also mean that a non-perturbative global anomaly cannot be captured by one loop or any loop perturbative Feynman diagram calculations— examples include the Witten anomaly and Wang–Wen–Witten anomaly . Scaling and renormalization

An anomaly -based intrusion detection system is an intrusion detection system for detecting both network and computer intrusions and misuse by monitoring system activity and classifying it as either normal or anomalous.The classification is based on heur…