<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 78-year-old man is brought to the emergency department by ambulance 30 minutes after the sudden onset of speech difficulties and right-sided arm and leg weakness. Examination shows paralysis and hypoesthesia on the right side, positive Babinski sign on the right, and slurred speech. A CT scan of the head shows a hyperdensity in the left middle cerebral artery and no evidence of intracranial bleeding. The patients symptoms improve rapidly after pharmacotherapy is initiated and his weakness completely resolves. Which of the following drugs was most likely administered?? A: Rivaroxaban, B: Alteplase, C: Heparin, D: Prasugrel, E: Warfarinn,  <response>: This is a clinical vignette describing a patient with acute onset of neurological deficits localized to the right side of the body, including arm and leg weakness, sensory changes, and speech difficulties. The description of a hyperdense left middle cerebral artery on CT along with the rapid improvement after treatment indicates this is likely an ischemic stroke caused by a clot in that artery. The treatment goal would be rapid clot dissolution to restore blood flow and minimize permanent brain damage. Of the choices, alteplase also known as tPA is a thrombolytic medication used to break down clots in cases of acute ischemic stroke. The other options are anticoagulants used for stroke prevention but not optimal for acute treatment.B: Alteplase 