Clinical Medical Assistant Exam Practice Question

Correct Answer: D

Rationale: Antiseptics are crucial for preventing infection during venipuncture. Soap and water (D) are primarily used for cleaning but do not provide the rapid antimicrobial action required for skin disinfection in a medical setting, making them less effective as an antiseptic.

Povidone-iodine (A) and chlorhexidine (B) are both effective antiseptics that reduce microbial load significantly. 70% isopropyl alcohol (C) is also a widely accepted antiseptic that quickly disinfects the skin. Therefore, while A, B, and C are suitable for venipuncture, D lacks the necessary antiseptic properties.