This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Back region, Subject name: Anatomy
[{'content': 'The tooth like structure of C2 veebra that forms Pivot Joint with C1 veebra is called as odontoint. The other name is? \nSelect and explain. \nA. Ligamentum flavum, B. Dens, C. Matrix, D. Condyl', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The projecting tooth like structure is called as dens. Condyl is a rounded structure at the extremity of the bones and matrix is a binding structure in which binds all the organic structures.', 'role': 'assistant'}]