Medicine Vitamin B12 is required for a number of metabolic processes. Which of the following lesions would NOT lead to a deficiency of this vitamin? A Chronic gastritis resulting in achlorhydria B Autoimmune destruction of gastric parietal cells C Surgical resection of the jejunum D Surgical resection of the ileum 💡 Explanation Vitamin B12 is required for a number of metabolic processes. Which of the following lesions would NOT lead to a deficiency of this vitamin? ✓ Correct Answer: C. Surgical resection of the jejunum