Final answer:
The term metacarp/o is related to the metacarpus, which consists of the five bones forming the palm of the hand, numbered from the thumb side. Hence, the correct answer is Metacarpus.
Step-by-step explanation:
The term metacarp/o refers to the metacarpus, which is the region that consists of the five elongated bones forming the palm of the hand. These metacarpal bones are numbered 1-5, starting from the lateral side with the thumb as number one. They span between the carpal bones of the wrist and the phalanges of the fingers and thumb. The metacarpal bones articulate with the proximal phalanges at the metacarpophalangeal joints, also known as the knuckle joints. Therefore, the correct answer is option 1) Metacarpus.