Which combining form is used to refer to the liver?

• A. ren/o
• B. pulmon/o
• C. hepat/o
• D. gno/o

Answer: (C)

The main idea here is knowing organ-specific combining forms used in medical terms. The liver is referred to by hepat/o. This combining form appears in terms like hepatitis (inflammation of the liver) and hepatic (pertaining to the liver), showing that hepat/o is the root used for things related to the liver. The other options point to different meanings: ren/o is for the kidney (as in renal), pulmon/o is for the lung (as in pulmonary), and gno/o relates to knowledge or knowing rather than an organ. So the liver-specific combining form is hepat/o.