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
Nalidixic acid is used in:(1994) 
Select and explain. 
A. UTI, B. Bacillary dysentry, C. Enteric fever, D. Malaria
A: UTI
Answer: A: UTI 
Explanation: a