This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 2, Subject name: Forensic Medicine
O.P.C. Poisoning is characterised by all, except: 
Select and explain. 
A. Pulmonary oedema, B. Pin point pupil, C. Constipation, D. Vomiting
C: Constipation
Answer: C: Constipation 
Explanation: Symptoms of OP Compound Poisoning: Muscarinic symptoms: Bronchoconstriction Bronchorrhea Bradycardia Miosis Sweating Salivation Lacrimation Micturition diarrhoea Nicotinic symptoms: Fasciculation Dyspnoea Cyanosis