This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
An old patient of tubercular meningitis is not responding to treatment. A new combination of drugs has to be prescribed for a prolonged period. Which one of the following should not be prescribed in this case - 
Select and explain. 
A. Rifampicin, B. Ofoxacin, C. Dehydrostreptomycin, D. Pyraxinamide
C: Dehydrostreptomycin
Answer: C: Dehydrostreptomycin 
Explanation: None