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
Vasanthi 45 years, was brought to casualty with abnormal movements which included persistent detion of neck to right side one day before she was prescribed Haloperidol 5 mgs 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: Ans. is 'a' i.e., Acute drug dystonia o Persistent detion of neck (Toicollis) after one day of taking haloperidol is a feature of acture muscular dystonia (acute drug dystonia). Acute muscular dystonia o Bizarre muscle spasms mostly involving linguo-facial muscles --> grimacing, tongue thrusting, toicollis, locked jaw. o Occurs within a few hours of a single dose. o More common in children below 10 years and girls. o Treatment --> central anticholinergic