This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Sundar Lal 28 year old farmer is found convulsing in the farm. Hea rate is 100/min and blood pressure is 180/110mm Hg. Diarrhoea sweating and urination and Apparent. Pupils are pin point. Drug poisoning is suspected. Most probable cause is 
Select and explain. 
A. Acetaminophen overdose, B. Amphetamine toxicity, C. Organo-phosphsphate poisoning, D. Atropine poisoning
C: Organo-phosphsphate poisoning
Answer: C: Organo-phosphsphate poisoning 
Explanation: Ref-KDT 6/e p104,105 Only symptoms are of antichlorinesterase poisoning accepted raised blood pressure and hea rate. At hugh dose,ACh can stimulates NN and NM receptor. This symptoms may occur due to the nicotinic action of ACh