This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Atropine is useful in organophosphate poisoning because it 
Select and explain. 
A. Reactivates Acetylcholineesterase, B. Competes with acetyl chloline release, C. Binds with both nicotinic and muscarinic acetylcholine receptors, D. Is a competitive antagonist of acetylcholine
D: Is a competitive antagonist of acetylcholine
Answer: D: Is a competitive antagonist of acetylcholine 
Explanation: Atropine acts as an antagonist at muscarinic receptors. It has no activity on nicotinic receptor and do not interfere with the release of ACh Ref-KDT 6/e p106