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: Social & Preventive Medicine
[{'content': 'A 30 years old lady was brought to the hospital with strong labour pains for the last 3 hours and no progress. She was found to have pelvic deformities which lead to cephalopelvicdisproportion. The baby was delivered by a cesarean section. The woman is likely to have suffered from the deficiency of \nSelect and explain. \nA. Vitamin D, B. Vitamin B, C. Vitamin C, D. Vitamin A', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]