This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Local cerebral lesion with a ring on CT scan is caused by – 
Select and explain. 
A. Toxoplasmosis, B. Intracranial haemorrhage, C. Cysts, D. Hamartoma
A: Toxoplasmosis
Answer: A: Toxoplasmosis 
Explanation: Toxoplasmosis can cause ring-enhancing brain lesions.