The most common combining form is:

The most common combining form is:

A. a

B. e

C. u

D. o

View Answer

Answer: D

Explanation:

The most common combining form in medical terminology is "o". A combining form consists of a root word and a combining vowel, typically "o", which is used to ease pronunciation when adding suffixes or when combining multiple roots.

Reference: Chabner, D.-E. (2016). The Language of Medicine (11th ed.). Elsevier. Cohen, B. J., & DePetris, A. (2013). Medical Terminology: An Illustrated Guide (7th ed.). Lippincott Williams & Wilkins.