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What is 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 the most probable diagnosis: March 2013 (f, g) and explain in detail?
Ans. C i.e. Schizophrenia