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: Pharmacology
Phenothiazines are used to: 
Select and explain. 
A. Produce muscle relaxation, B. Alter psychotic behaviour, C. Suppress coughing, D. Produce analgesia
B: Alter psychotic behaviour
Answer: B: Alter psychotic behaviour 
Explanation: None