This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Schizophreniform Disorder, Subject name: Psychiatry
A child with schizophrenia was on medications. Suddenly he developed neck stiffness and spasm. Best treatment of such a case is? 
Select and explain. 
A. Benzatropine, B. Lorazepam, C. Diphenhydramine, D. Propranolol
A: Benzatropine
Answer: A: Benzatropine 
Explanation: Ans. (a) BenzatropineRef. Handbook of psychiatric drug therapy by Lawrence A. Labbate, Maurizio favay Jerrold F. Rosenbaum, George W. Arana 6th ed. /37y Medical toxicology edited by Richard C. Dart 3th ed. /869)