<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 60-year-old male presents to the emergency room complaining of substernal chest pain. He reports a three-hour history of dull substernal chest pain that radiates into his left arm and jaw. He had a similar incident two months ago after walking one mile, but this pain is more severe. His past medical history is notable for hypertension and hyperlipidemia. An EKG demonstrates non-specific changes. Serum troponins are normal. In addition to aspirin, oxygen, and morphine, he is started on a medication that generates endothelial nitric oxide. Which of the following is a downstream effect of this molecule?? A: Guanylyl cyclase activation, B: cAMP production, C: Prostaglandin synthesis inhibition, D: ß1-adrenergic antagonism, E: L-type calcium channel inhibition,  <response>: This is a clinical vignette describing a patient with symptoms and history consistent with acute coronary syndrome ACS. The question asks about the downstream effects of a medication that generates nitric oxide, which is used to treat ACS. Nitric oxide activates guanylyl cyclase, which increases cGMP levels and causes vasodilation. The correct answer should reflect this mechanism of action.A: Guanylyl cyclase activation 