Which one of the following statements is false with regard to pyuria in children

• A. Pyuria may be present without Urinary tract infection
• B. Isolated pyuria is neither confirmatory nor diagnostic for Urinary tract infection
• C. Presence of more than 5 WBC/hpf (high power field)for girls and more than 3 WBC/hpf for boys
• D. Infection can occur without pyuria