Multiple choice

Which among the following structures are not found in the Circle of Willis?

  1. The basilar artery

  2. The anterior cerebral artery

  3. The anterior communicating artery

  4. The internal carotid artery

  5. The posterior communicating arteries
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A Correct answer
Explanation

It arises from the confluence of the two vertebral arteries at the junction between the medulla oblongata and the pons. The basilar artery and middle cerebral arteries, supplying the brain, are not considered a part of the circle.

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