In wich one of the following infections is ciprofloxacin ineffective ?
A.
Urinary tract infections due to the β-Lactamase producing strain of Klebsiella.
B.
Pneumonia due to Strep. pheumoniae.
C.
Exacerbation of chronic bronchitis due to Moraxella catarrhalis.
D.
Urinary tract infections due to Escherichia coli.
E.
Urinary tract infections due to Pseudomonas aeruginosa.