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: Pathology
[{'content': 'Talon cusp can be seen in: \nSelect and explain. \nA. Mohr syndrome, B. Rubinstein Taybi syndrome, C. Sturge - Weber syndrome, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Talon cusp is an additional cusp that is usually located on the lingual surface of anterior teeth. It extends atleast half the distance from the cemento-enamel junction to the incisal edge. It is composed of normal enamel and dentin and contains a horn of pulp tissue.\nIt is seen in:\xa0\n\nMohr syndrome\nRubinstein Taybi\xa0syndrome\nSturge-Weber syndrome', 'role': 'assistant'}]