This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Antibiotics, Subject name: Pharmacology
The following anti-HIV drug should not be combined with zidovudine because of mutual antagonism 
Select and explain. 
A. Nevirapine, B. Ritonavir, C. Stavudine, D. Lamivudine
C: Stavudine
Answer: C: Stavudine 
Explanation: Stavudine (d4T) It is also a thymidine analogue which acts by utilizing the thymidine kinase for activation, AZT(zidovudine) antagonises the effect of stavudine and the two should not be used together. It should also not be combined with didanosine, because both cause peripheral neuropathy. side effects:- Frequent peripheral neuropathy, lipodystrophy, lactic acidosis, and rarely pancreatitis are noted. Ref:- kd tripathi; pg num:-807