This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drug Abuse, Subject name: Forensic Medicine
Regarding alcoholic gaze nystagmus, which one of the following is false 
Select and explain. 
A. It appears at blood alcohol levels of 50 - 100 mg %, B. Horizontal gaze nystagmus is pathognomic of alcohol intoxication, C. Positional alcohol nystagmus I occurs 30 minutes after ingestion, D. Positional alcohol nystagmus II occurs 5 - 6 hours after ingestion
B: Horizontal gaze nystagmus is pathognomic of alcohol intoxication
Answer: B: Horizontal gaze nystagmus is pathognomic of alcohol intoxication 
Explanation: Alcoholic gaze nystagmus - It appears at blood alcohol levels of 50 - 100 mg % - Positional alcohol nystagmus I occurs 30 minutes after ingestion - Positional alcohol nystagmus II occurs 5 - 6 hours after ingestion - Horizontal gaze nystagmus is not pathognomic of alcohol intoxication, can occur in pathological conditions, ingestion of sedatives and transquillizers