Final answer:
Tylenol (option b) would be of least benefit for Jim, a 64-year-old with RA. Tylenol can relieve pain but does not target the underlying immune system dysfunction that causes RA.
Step-by-step explanation:
For Jim, a 64-year-old with rheumatoid arthritis (RA), the drug of least benefit would be tylenol (option b). While tylenol can help relieve pain, it does not specifically target the underlying immune system dysfunction that causes RA. Disease modifying antirheumatic drugs (DMARDs), NSAIDs, and glucocorticoids (like cortisol) are all commonly used to treat RA by reducing inflammation and modifying the disease progression.