A patient visited the office to see his primary care physician and the physician lists the final diagnosis as diarrhea and constipation due to either irritable bowel syndrome or diverticulitis. The following codes are assigned:
a. R19.7, K59.00
b. K58.9, K57.90, K59.00, R19.7
c. K58.9, K57.92
d. K57.90, K58.0