Clinical Medical Assistant Exam Practice Question

Correct Answer: D

Rationale: When taking a patient's blood pressure, sitting with back supported and arm at heart level (D) is optimal. This position ensures that the blood pressure reading is accurate, as it allows for proper circulation and minimizes stress on the body.

Option A, lying down with legs elevated, can lead to inaccurate readings due to changes in vascular resistance. Option B, standing with arms at their sides, may not provide stable support for the arm, affecting the measurement. Option C, sitting without back support and with legs crossed, can induce muscle tension and alter blood flow, leading to unreliable results.