This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Microbial, Subject name: Pharmacology
As per WHO protocol ATT drug C/l in pregnancy: 
Select and explain. 
A. Rifampicin, B. Pyrazinamide, C. Ethambutol, D. Streptomycin
D: Streptomycin
Answer: D: Streptomycin 
Explanation: Ans: D (Streptomycin) T.B Treatment during pregnancy Park 21st/175"During pregnancy, streptomycin can cause permanent deafness in the baby, so ethambutol should be used instead of streptomycin. Isonsazid, rifampicin, pyrazinamide & ethambutol are safe to use. Second-line drugs such as fluoroquinolones, ethionamide PS protionamide are teratogenic & should not he used"T.B Treament during pregnancy1 KDT6th/ 748-49"The WHO & British Thoracic Society consider H, R & Z to be safe to the foetus & recommended the standard 6 month (2HRZ+4HR) regimen for pregnant women with T.B. Ethambutol can be added during late but not early pregnancy Streptomycin is contraindicated"