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1. which one of the following is a source of pulmonary embolism?
- A. Deep veins of leg
- B. Deep veins of leg
- C. Deep veins of leg
- D. Deep veins of leg
Answer: Option A
Explanation:
In most cases, pulmonary embolism is caused by blood clots that travel to the lungs from deep veins in the legs or, rarely, from veins in other parts of the body (deep vein thrombosis).
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