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: Dental
[{'content': 'In partial veneer crown, retention can be increased by \nSelect and explain. \nA. Increased Length of path of insertion, B. Increase in taper, C. Making path of removal parallel to Long axis of adjacent teeth, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]