Final answer:
The NP should not order the BUN/Cr test as the patient's symptoms suggest conditions like strep throat or infectious mononucleosis, where BUN and Creatinine tests, which evaluate kidney function, are not initially indicated.
Step-by-step explanation:
The correct option is C:
The NP should order all of the following except c. BUN/Cr (Blood Urea Nitrogen/Creatinine). The symptoms presented by the patient, which include extreme fatigue, sore throat, enlarged posterior cervical nodes, and abdominal pain, could suggest a range of conditions including infections like strep throat, infectious mononucleosis, or other systemic infections that could potentially affect the spleen or liver. Ordering a CBC (Complete Blood Count) would be helpful to check for signs of infection or anemia, LFTs (Liver Function Tests) to assess potential liver involvement which can be seen in infections such as mononucleosis, and a Monospot test to directly test for infectious mononucleosis, which is commonly caused by the Epstein-Barr Virus (EBV).
However, while the BUN and Creatinine are important tests for renal function, they are not directly related to the diagnosis of the conditions most strongly suggested by the presenting symptoms in this scenario. In this case, the kidney function tests (BUN and Creatinine) may not provide immediate useful information in the absence of symptoms or signs of kidney involvement. As such, BUN/Cr is the test that is least indicated given the current clinical presentation.