This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Which of the following patient require Vit B12 supplementation? \nSelect and explain. \nA. Patient on strict vegetarian diet, B. Patient with normal B12 level having dementia, C. Patient with elevated homocystein level, D. General debility', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Dietary deficiency of\xa0 B12,\xa0 is seen among the\xa0 strict\xa0 vegetarians of\xa0 low\xa0 socioeconomic group in the developing countries (lndia, Srilanka etc.).', 'role': 'assistant'}]