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
A psychotic female on phenothiazine therapy complains of sudden onset of high grade fever, muscle rigidity and altered sensorium. The diagnosis is: 
Select and explain. 
A. Malignant hyperthermia, B. Neuroleptic malignant syndrome, C. Tardive dyskinesia, D. Akathisia
B: Neuroleptic malignant syndrome
Answer: B: Neuroleptic malignant syndrome 
Explanation: None