Final answer:
The target dose of quinapril in heart failure is 20 mg once daily.
Step-by-step explanation:
The target dose of quinapril in heart failure is 20 mg once daily (option c).
Quinapril is an ACE inhibitor commonly used to treat heart failure. The target dose may vary depending on the individual patient, but the usual starting dose is 5 mg once daily, which can then be gradually increased to achieve the goal dose of 20 mg once daily.
It is important to note that the dose of quinapril should be personalized and adjusted based on the patient's response and tolerability, and it should be done under the guidance of a healthcare professional.