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: Pathology
Vascular event of inflammation in order-a) delayed prolonged- leukocytes mediated injuryb) immediate transient - mast cell activation lead to release of histamine bradykininc) immediate prolonged- direct endothelial injury by bacterial toxind) Somewhat delayed prolonged- sun exposure /heat stroke lead to mild endothelial injury 
Select and explain. 
A. ABCD, B. DCBA, C. ACDB, D. BDCA
D: BDCA
Answer: D: BDCA 
Explanation: Answer- DB, D, C, A