Which of the following is a combining form that denotes the appendix?

• A. appendic/o
• B. end-
• C. lith/o
• D. rhin/o

Answer: (A)

Understanding combining forms means recognizing a root plus a connecting vowel used to build medical terms. The form that denotes the appendix is appendic/o, built from the root appendic- with the linking vowel o. This base appears in terms like appendicitis, appendectomy, and appendiceal, all relating to the appendix. The other options don’t refer to the appendix: end- is a prefix meaning within or at the end, lith/o means stone, and rhin/o means nose.