Blockage of which arteries can cause a stroke?

• A. Heart attack
• B. Aneurysm
• C. Pulmonary embolism
• D. Stroke

Answer: (D)

Blockage of the arteries that supply the brain disrupts blood flow to brain tissue, leading to a stroke. When a clot blocks a cerebral artery, oxygen and nutrients can’t reach brain cells, causing cell death and neurological deficits; this is known as an ischemic stroke and is the most common type. Other choices involve different parts of the body or processes: a heart attack results from blockage of coronary arteries feeding the heart, an aneurysm is a weakened vessel that can rupture, and a pulmonary embolism blocks arteries in the lungs. Since the question focuses on arteries whose blockage causes a stroke, the event is driven by obstruction in brain arteries, making stroke the correct concept.