This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
A 7-year-old child with the rheumatic fever, the following investigations would be needed except 
Select and explain. 
A. Electrocardiogram, B. Echocardiogram, C. Blood culture, D. Urine examination
D: Urine examination
Answer: D: Urine examination 
Explanation: Recommended Tests in Cases of Possible Acute Rheumatic Fever : White blood cell count Erythrocyte sedimentation rate C-reactive protein Blood cultures if febrile Electrocardiogram (if prolonged P-R interval or other rhythm abnormality, repeat in 2 weeks and again at 2 months if still abnormal) Chest x-ray if clinical or echocardiographic evidence of carditis Echocardiogram (consider repeating after 1 month if negative) Throat swab (preferably before giving antibiotics)--culture for group A streptococcus Antistreptococcal serology: both anti-streptolysin O and anti-DNase B titers, if available (repeat 10-14 days later if first test not confirmatory) Ref : Harrison 19th edition pg: 2153