This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': '8,9 & 10th ribs are attached to 7th rib by which joint \nSelect and explain. \nA. Fibrous, B. Synol, C. 1st cailagenous, D. 2nd cailaginous', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Aicular surface of the seventh to tenth ribs are flat, permitting up and down gliding movements or bucket-handle movements of lower ribs B D CHAURASIA&;S HUMAN ANATOMY UPPER LIMB THORAX, VOLUME -1 SIXTH EDITION Page no:209,201', 'role': 'assistant'}]