Final answer:
The combining form that refers to pus is 'py/o'. This is illustrated by medical terms like 'pyoderma' for a pus-producing skin infection and 'pyuria' for pus in the urine. the correct option is c. py/o .
Step-by-step explanation:
The combining form that refers to pus is c. py/o. Pus is an accumulation of dead pathogens, neutrophils, tissue fluid, and other cells that are often the result of the body's response to infection. In medical terminology, the prefix py/o is commonly used to denote pus. For example, pyoderma refers to any suppurative (pus-producing) infection of the skin, and pyuria refers to the presence of pus or white blood cells in the urine.
It is important to distinguish this from pyel/o, which refers to the renal pelvis of the kidney, as in pyelonephritis, which is an infection of one or both kidneys.
The combining form that refers to pus is pyo-. This can be seen in words like pyuria which refers to the presence of pus or white blood cells in the urine.