<prompt> A 10-year-old obese child from endocrinology department was referred to emergency for a painful limp with hip pain which of the following investigation is not required:X-ray of the hipMRI of the hipCT scan of hipUSG of hip  <response>: cThis is an Obese Limping child with hip pain the possible differential diagnosis will be Osteomyelitis X-MASSeptic arthritis X-MASSlipped capital femoral epiphysis X-MRITransient synovitis X-MASHence CT will be least preferred. Previously CT Scan was carried out for SCFE but now MRI has replaced its indication. 