The combining form efface/o- means ________

A) "do away with; obliterate"
B) "efficient"
C) "entrance; opening"
D) "thinning"


A
Explanation: A) Correct!
B) There are no medical word parts that mean efficient.
C) Efface/o- does not mean entrance; opening.
D) There are no medical word parts that mean thinning.

Health & Biomechanics

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