Which prescription for a client is correctly transcribed?

The correct transcription of the prescription reflects the appropriate route and dosing for administering potassium chloride. In this instance, the option that states "Potassium chloride 20 mEq PO every morning" indicates that the medication is to be taken by mouth (orally), which is a common and safe route for potassium chloride administration in outpatient settings and for many patients who do not require intravenous (IV) administration.

Oral potassium chloride is typically used for the prevention and treatment of hypokalemia and is well-tolerated by most patients when correctly dosed. The specified dose of 20 mEq is a standard and acceptable amount for daily supplementation in many scenarios, assuming the patient's electrolyte levels and clinical status are being monitored.

In contrast, other options present dosages or routes that might be less common or not appropriate for certain conditions or patient profiles. For instance, while IV administration might be necessary in acute settings for rapid correction, it generally requires careful monitoring and specific scenarios. Choices involving different dosages or frequencies must also be in alignment with clinical guidelines and the individual patient’s needs to ensure patient safety.