This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
Characterstic features of opioid withdrawal is: 
Select and explain. 
A. Rhinorrhea and lacrimation, B. Seizures, C. Delirium Tremors, D. Transient visual, tactile or auditory hallucinations
A: Rhinorrhea and lacrimation
Answer: A: Rhinorrhea and lacrimation 
Explanation: Opiod withdrawal symptoms are lacrimation,sweating, yawning, anxiety, apprehension, restlessness, rhinorrhoea and tremors seen 8-12 hours after the last dose. Ref KD Tripathi 8th ed.