The Nurse Is Ranking a Patient's Prescribed Pain Medications According

The nurse is ranking a patient's prescribed pain medications according to their strengths. Using the WHO analgesic ladder, in what order, from weakest to strongest, should the nurse rank the medications?
A) Morphine sulfate 5 mg IV
B) Ibuprofen 400 mg PO with the anticonvulsant gabapentin (Neurontin) 300 mg PO
C) Propoxyphene HCL (Darvon) 250 mg. PO
D) Acetaminophen (Tylenol) 325 mg PO
E) non of the above.