This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Psychiatry
[{'content': 'Delusion is a disorder of: September 2011 \nSelect and explain. \nA. Stream of thought, B. Form of thought, C. Content of thought, D. Possession of thought', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Content of thoughtIn clinical examination, "thought" is assessed mainly under 2 headings of stream and form and content of thought. In Content of thought, one looks for any preoccupations such as obsessions, contents of phobias, delusions etc. Terminology in psychiatry:Illusion: Misinterpretation of stimuli arising from external objectHallucination: Perception without stimuliDelusion: False unshakeable belief not amenable to reasoningDelusion:Disorder of thoughtNihilistic delusion: DepressionDelusion of grandeur: ManiaParanoid delusion and delusion of reference: Schizophrenia', 'role': 'assistant'}]