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: Pharmacology
[{'content': 'Vitamin beneficial in osteoporosis in combination with Vitamin D is - \nSelect and explain. \nA. Vitamin E, B. Vitamin A, C. Vitamin K, D. Vitamin B', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Vitamin K o Recently it has been found that Vitamin K (especially) K2 also improves calcium deposition in bone as it activates osteocalcin (produced by osteoblasts), which is needed for calcium trapping.", 'role': 'assistant'}]