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
8,9 & 10th ribs are attached to 7th rib by which joint 
Select and explain. 
A. Fibrous, B. Synol, C. 1st cailagenous, D. 2nd cailaginous
B: Synol
Answer: B: Synol 
Explanation: 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