This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pediatrics
Which one of the following statement is FALSE with regard to pyuria in children: 
Select and explain. 
A. Presence of more than 5 WBC/hpf for girls and more than 3 WBC/hpf for boys, B. Infection can occur without pyuria, C. Pyuria maybe present without UTI, D. Isolated pyuria is neither confirmatory nor diagnostic for urinary tract infection
A: Presence of more than 5 WBC/hpf for girls and more than 3 WBC/hpf for boys
Answer: A: Presence of more than 5 WBC/hpf for girls and more than 3 WBC/hpf for boys 
Explanation: a. Presence of more than 5WBC/hpf for girls and more than 3WBC/hpf for boys(Ref: Nelson's 20/e p 2557)High Yield Points:Pyuria suggests infection, but infection can occur in the absence of pyuria; Conversely, pyuria can be present without UTI;Sterile pyuria (positive leukocytes, negative cultures) occurs in partially treated bacterial UTI, viral infections, renal tuberculosis, renal abscess, interstitial nephritis, inflammation near ureter or bladderIn an uncentrifuged urine specimen >5WBCs/hpf is abnormal and is called pyuria.