This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neuroradiology, Subject name: Radiology
On MRI, which of the following shows diffusion restriction? 
Select and explain. 
A. Ependymoma, B. Meningioma, C. Medulloblastoma, D. Germinoma
C: Medulloblastoma
Answer: C: Medulloblastoma 
Explanation: Lesions showing Diffusion Restriction include :- Medulloblastoma and other High cellularity tumors Cerebral abscess Epidermoid cyst and Acute Infarct MRI axial images of DWI and ADC map showing hyper intense lesion on DWI with corresponding hypointensity on ADC map in 4th ventricle- restricted diffusion.