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
Kallu a 24 year old occasional alcoholic had got a change in behaviour. He has become suspicious that people are trying to conspire against him, though his father states that there is no reason for his fears. He is getting hallucinations of voices commenting on his actions what is most probable diagnosis - 
Select and explain. 
A. Delirium tremens, B. Alcohol induced psychosis, C. Schizophrenia, D. Delusional disorder
C: Schizophrenia
Answer: C: Schizophrenia 
Explanation: This patient has:-


The delusion of persecution (people are trying to conspire against him).
Third person hallucination (voices commenting on his action)


Third person hallucination is characteristic of schizophrenia.