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: Forensic Medicine
A farmer presented with confusion, increased salivation, fasiculations, miosis, tachycardia and hypeension. Poison that can cause these manifestations: FMGE 10; AIIMS 12; KCET 13; PGI 14; JIPMER 14 
Select and explain. 
A. Opium, B. OPC, C. Dhatura, D. Arsenic
B: OPC
Answer: B: OPC 
Explanation: Ans. OPC