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: Medicine
Lacunar infarcts are caused by - 
Select and explain. 
A. Lipohyalinosis of penetrating arteries, B. Middle carotid artery involvement, C. Emboli to anterior circulation, D. None of the above
A: Lipohyalinosis of penetrating arteries
Answer: A: Lipohyalinosis of penetrating arteries 
Explanation: None