The combining form "phalang/o" is related to which of the following?

The combining form "phalang/o" specifically refers to phalanges, which are the bones found in the fingers and toes. This root is derived from the Greek word "phalanx," which literally means "line of battle," but in anatomical terms, it denotes the individual bones that make up the digits.

Understanding this, you can see that the other terms do not relate to "phalang/o." For instance, the combining form for veins is often "ven/o," and "son/o" pertains to sound. The pharynx, an anatomical structure in the throat, is associated with the combining form "pharyng/o." In summary, "phalang/o" is directly linked to the structure of the bones in the digits, making "phanges" the accurate choice.