This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
Lacunar infarction is seen in: 
Select and explain. 
A. Large vessel stroke, B. Small vessel stroke, C. Artery to artery embolic stroke, D. Temporal arteritis
B: Small vessel stroke
Answer: B: Small vessel stroke 
Explanation: (Small vessel stroke) (2378-H 16th) (864-66-CMDT-2009) (2519-H17th)(A) LACUNAR INFARCTION - refer to infarction following atherothrombotic or lipohyalinotic occlusion of a small artery (30 to 300 pm) in the brain. The term small vessel stroke denotes occlusion of such small penetrating artery and is now the preferred.* Lacunar infarctions are associated with poorly controlled hypertension or diabetes.(B) CEREBRAL INFARCTION - Thrombotic or embolic occlusion of a major vessels leads to cerebral infarction.* Causes include the disorders predisposing to transient ischemic attacks and atherosclerosis.