<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 32-year-old farmer is brought to the emergency department by his wife. The patient was reportedly anxious, sweaty, and complaining of a headache and chest tightness before losing consciousness on route to the hospital. Which of the following is mechanistically responsible for this patients symptoms?? A: Competitive inhibition of acetylcholine at post-junctional effector sites, B: Binding of acetylcholine agonists to post-junctional receptors, C: Inhibition of presynaptic exocytosis of acethylcholine vesicles, D: Irreversible inhibition of acetylcholinesterase, E: Reversible inhibition of acetylcholinesterase,  <response>: This is a clinical vignette describing a patient with symptoms of anxiety, sweating, headache, chest tightness, and loss of consciousness. The question is asking about the underlying mechanism responsible for these symptoms.Based on the description, this is likely a case of organophosphate or carbamate poisoning, which causes excessive acetylcholine accumulation due to irreversible inhibition of acetylcholinesterase. Choice A is incorrect because competitive inhibition would be reversible. Choice B may cause some cholinergic effects but would not lead to the severe syndrome described.Choice C would decrease acetylcholine levels. Choice D matches the mechanism of organophosphatecarbamate poisoning leading to excessive acetylcholine levels and the clinical syndrome described.Choice E is incorrect because reversible inhibition of acetylcholinesterase would not cause the severe, persistent symptoms described here.D: Irreversible inhibition of acetylcholinesterase 