What describes a bizarre delusion?

A bizarre delusion is characterized as a false belief that is absurd or fantastic, which aligns perfectly with the correct answer. These delusions are typically implausible and are significantly outside of what is generally considered possible or understandable. For instance, believing that one is being controlled by extraterrestrial beings or that one has obtained special powers without any basis in reality would fit this definition.

In contrast, the other options describe different psychological phenomena or symptoms. A is more related to depression, where common symptoms include feelings of hopelessness and worthlessness. C speaks to emotional disengagement, which can be found in various mental health conditions but does not specifically pertain to delusions. D refers to disorientation, often seen in conditions such as dementia, but again, it does not specifically relate to the nature of bizarre delusions.