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: Forensic Medicine
A 20-year-old boy presented with fever along with hearing of voices, aggressive behavior, muttering to self since 2 days. Diagnosis is: AIIMS 10; KCET 13; COMEDK 13 
Select and explain. 
A. Acute schizophrenia, B. Acute psychosis, C. Delirium, D. Delusional disorder
C: Delirium
Answer: C: Delirium 
Explanation: Ans. Delirium