Final answer:
The CBC, or Complete Blood Count, is the test among the provided options that must be performed on whole blood.
Step-by-step explanation:
The test that must be performed on whole blood among the options provided is CBC (Complete Blood Count). A CBC includes various tests that evaluate the different cells in the blood, such as red blood cells, white blood cells, and platelets. It provides important information on the general status of your health and can help diagnose a wide range of conditions, from anemia to infection. On the other hand, BUN (blood urea nitrogen) tests estimate urea in the blood and are an indicator of kidney function, but do not require whole blood specifically. Tests like CPK (Creatine Phosphokinase) and PTT (Partial Thromboplastin Time) also do not specifically require whole blood.
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