A 60-year-old man presents to the emergency department with sudden-onset right-sided weakness and difficulty speaking. His symptoms began approximately 2 hours ago. On examination, you note right hemiparesis and expressive aphasia. His blood pressure is within normal limits, and there are no signs of trauma. A non-contrast CT scan of the head shows no acute abnormalities. What is the most likely diagnosis?

A 60-year-old man presents to the emergency department with sudden-onset right-sided weakness and difficulty speaking. His symptoms began approximately 2 hours ago. On examination, you note right hemiparesis and expressive aphasia. His blood pressure is within normal limits, and there are no signs of trauma. A non-contrast CT scan of the head shows no acute abnormalities. What is the most likely diagnosis?

A: Ischemic Stroke

B: Traumatic Brain Injury (TBI)

C: Multiple Sclerosis (MS)

D: Brain Tumor

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