Final answer:
In the anatomical description, the palms of the hands must face forward; therefore, 'Palms facing posteriorly' is not correct for the anatomical position.
Step-by-step explanation:
The anatomical position description entails the body being in an upright stance, with the feet at shoulder width and parallel, toes forward. The upper limbs are held out to each side, and importantly, the palms of the hands face forward. Option a) 'Palms facing posteriorly' is NOT part of the description of the human body in anatomical position because in the anatomical position, the palms should be facing anteriorly (towards the front).