This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
False about 1st metacarpal is 
Select and explain. 
A. Shoest and stoutest of all metacarpals, B. Does not aiculate with any other metacarpal bone, C. Rotated medially through 90 degrees with respect to other metacarpals, D. The base is occupied by a condylar aicular surface for trapezium
D: The base is occupied by a condylar aicular surface for trapezium
Answer: D: The base is occupied by a condylar aicular surface for trapezium 
Explanation: The base of the 1st metacarpal bone is occupied by a convexo-concave ave aicular surface for the trapezium. It is the shoest and stoutest of all metacarpal bones. The first metacarpal bone is rotated medially through 90degrees relative to other metacarpals. As a result of this rotation, the movements of the thumb take place at right angles to those of other digits. REF: BD Chaurasia 7th edition Page no: 28 and 29.