In relation to other metacarpals, the first metacarpal is: (A) Posterior, (B) Anterior, (C) Laterally rotated, (D) Dorsally rotated
Answer is B. The 1st metacarpal bone (lying on a more anterior plane ) is rotated medially through 90deg 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. B D Chaurasia 7th edition Page no : 29