While being interviewed, the patient expresses that he believes other people can place thoughts in his mind. The statement can be assessed as evidence of:

Choice A reason: Somatic delusions involve false beliefs about bodily functions or sensations, such as believing one’s organs are rotting or infested. They do not pertain to thought control or external manipulation of cognition. Choice B reason: Ideas of reference involve misinterpreting external events as having personal significance, such as believing a news anchor is speaking directly to them. This does not involve the belief that others are inserting thoughts. Choice C reason: Thought insertion is a type of delusion where the individual believes that thoughts are being placed into their mind by an external source. It is a classic symptom of schizophrenia and reflects a disturbance in the boundaries of self and cognition. Choice D reason: Nihilistic delusions involve beliefs that one is dead, does not exist, or that the world is ending. These are typically seen in severe depression or psychotic states and are unrelated to thought control.