<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 26-year-old man is brought to the emergency department due to right-sided facial and upper extremity weakness and aphasia. The patient was in his usual state of health until two hours prior to presentation, when he was eating breakfast with a friend and acutely developed the aforementioned symptoms. Medical history is unremarkable except for mild palpitations that occur during times of stress or when drinking coffee. Physical examination is consistent with the clinical presentation. Laboratory testing is unremarkable and a 12-lead electrocardiogram is normal. A non-contrast head CT and diffusion-weighted MRI shows no intracranial hemorrhage and an isolated superficial cerebral infarction. Transthoracic echocardiography with agitated saline mixed with air shows microbubbles in the left heart. There is a possible minor effusion surrounding the heart and the ejection fraction is within normal limits. Which of the following is most likely the cause of this patients clinical presentation?? A: Amyloid deposition within vessels, B: Aortic embolism, C: Berry aneurysm rupture, D: Cardiac arrhythmia, E: Patent foramen ovale,  <response>: This is a clinical vignette describing a 26-year-old man with sudden onset right-sided weakness and aphasia. Key findings include:- Unremarkable past medical history except mild palpitations with stresscoffee- Physical exam consistent with right hemispheric stroke - Unremarkable labs and ECG- CT and MRI show isolated superficial cerebral infarction - Echocardiogram shows microbubbles in left heart and possible pericardial effusionThis presentation is most consistent with an embolic stroke. The patient is young and has no major stroke risk factors. The echocardiogram findings point towards a cardiac source of embolism. A patent foramen ovale PFO can allow paradoxical embolization of thrombus from the venous circulation to the arterial circulation, leading to stroke. This explains the patients presentation.The other choices are less likely:- Amyloid deposition and berry aneurysm rupture would cause intracerebral hemorrhage rather than infarction- Aortic embolism could cause this presentation but is less likely than paradoxical embolism through a PFO- Arrhythmia could lead to cerebral hypoperfusion but would be diffuse rather than a localized infarctionE: Patent foramen ovale 