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
Schizophrenia is characterised by A/E 
Select and explain. 
A. Formal thought disorder, B. Delusion of reference, C. Waxy flexibility, D. Altered sensorium
D: Altered sensorium
Answer: D: Altered sensorium 
Explanation: D i.e. Altered Sensorium