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
Acute opioid withdrawl is characterized by -a) Rhinorrhoeab) Piloerectionc) Miosisd) Insomniae) Constipation 
Select and explain. 
A. acd, B. abd, C. abc, D. ab
B: abd
Answer: B: abd 
Explanation: Manifestations of morphine withdrawal :- Lacrimation, Rhinorrhoea, sweating, anxiety & fear, yawning, restlesness, Goose flesh (piloerection), mydriasis, insomnia, abdominal colic, diarrhea, rise in BP, dehydration, palpitation, muscle cramp & body pain, rapid weight loss.