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': 'Joint b/w mandibular major and minor connector is? \nSelect and explain. \nA. Butt joint, B. Ball and socket joint, C. Obtuse angle joint, D. Acute angle joint', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Junctions of mandibular major and minor connector should be strong butt-type joints but without appreciable bulk.', 'role': 'assistant'}]