This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
A patient with AIDS and CD4 cell count of 100/ml, has a presistent fever and a weight loss associated with invasive pulmonary disease due to M avium complex. Optimal management of this case requires: 
Select and explain. 
A. Select an antibiotic regimen based on drug susceptibility of the cultured organism, B. Sta treatment with isoniazid and rifampicin, C. Treat the patient with clarithromycin, ethambutol and rifabutin, D. Treat with trimethoprim sulfamethoxazole
C: Treat the patient with clarithromycin, ethambutol and rifabutin
Answer: C: Treat the patient with clarithromycin, ethambutol and rifabutin 
Explanation: (Ref: KDT 6/e p750) Mycobacterium avium complex infection is treated with combination of rifabutin, ethambutol and clarithromycin.