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': 'Male component of pier abutment is placed on \nSelect and explain. \nA. Mesial side of pontic, B. Distal side of pontic, C. Mesial side of abutment, D. Distal side of abutment', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]