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
Withdrawl syndrome is associated with: September 2007 
Select and explain. 
A. Alcohol, B. Methadone, C. Morphine, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D: All of the above Drugs producing physical dependence: Alcohol Opioids, including morphine, methadone Benzodiazepine Amphetamines and cocaine produces little/no physical dependence.