The prefix ex- indicates which meaning?

• A. Into
• B. Out of
• C. Outside
• D. Against

Answer: (B)

Ex- signals movement outward from something or removal away from the inside. In medical terms you see it in exhale (breathing out), exsanguinate (to drain blood from the body), exogenous (originating from outside), and excretion (the process of removing waste). Because the prefix conveys going out or away, “out of” is the best fit. The other ideas don’t match as well: into would use a form indicating inward movement, outside is about location rather than the act of moving outward, and against would use a prefix like anti-. Think of the word exit as a memory aid—the meaning is moving outward.