Is a surgical procedure necessary because of peripheral vascular disease and consequent gangrene. trauma, malignancy, or congenital defects are additional reasons.

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Your question:  is a surgical procedure necessary because of peripheral vascular disease and consequent gangrene. trauma, malignancy, or congenital defects are additional reasons.

Your Amputation is a surgical procedure necessary because of peripheral vascular disease and consequent gangrene. trauma, malignancy, or congenital defects are additional reasons.

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The correct answer is  "a) has ingredients that are high in nutrients."