Multiple choice

Heart attack involves the blockage of the

  1. carotid artery

  2. aorta

  3. pulmonary vein

  4. coronary arteries
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D Correct answer
Explanation

Heart attacks (myocardial infarction) occur when coronary arteries supplying the heart muscle are blocked, typically by atherosclerotic plaque or thrombus. The carotid artery supplies the brain, the aorta is the main artery from the heart, and pulmonary veins carry oxygenated blood from lungs to the left atrium.

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