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
The chracteristic symptom of organic psychosis is 
Select and explain. 
A. Hallucination, B. Depression, C. Transient Delusion, D. Anxiety
C: Transient Delusion
Answer: C: Transient Delusion 
Explanation: C i.e. Transient delusions