This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genito Urinary System, Subject name: Radiology
[{'content': 'Differentiation between epididymo-orchitis and torsion testis can be done with which of the following? \nSelect and explain. \nA. Grey scale US, B. Color Doppler US, C. Angiography, D. MRI', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans BUSG is quick, easily available and can be used to rapidly confirm or rule out diagnosis of torsion testes. Epididymo- orchitis will show increased vascularity while torsion testes while appear pauci/avascular.', 'role': 'assistant'}]