This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'Posterior columns sensations in lower limbs are lost in \nSelect and explain. \nA. Vitamin A deficiency, B. Vitamin B12 deficiency, C. Vitamin C deficiency, D. Vitamin D deficiency', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Refer KDT 6/e p589 Deficiency of vitamin B12 leads to Megaloblastic anemia which is indistinguishable from folic acid deficiency Deficiency also have manifestations related to loss of myelin like Subacute combined degeneration of spinal cord', 'role': 'assistant'}]