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: Psychiatry
Vasanthi 45 years, was brought to casualty with abnormal movements which included persistent deviation of neck to right side one day before she was prescribed 1=laloperidol 5 mg three times daily from the psychiatry OPD. She also had an altercation with her husband recently. Which of the following is the most likely cause for her symptoms- 
Select and explain. 
A. Acute drug dystonia, B. Conversion reaction, C. Acute psychosis, D. Cerebrovascular accident
A: Acute drug dystonia
Answer: A: Acute drug dystonia 
Explanation: Persistent deviation of the neck (Torticollis) after one day of taking haloperidol is a feature of acute muscular dystonia (acute drug dystonia).