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
Most common cause of Aortic dissection - 
Select and explain. 
A. Hypertension, B. DM, C. Trauma, D. Marfan syndrome
A: Hypertension
Answer: A: Hypertension 
Explanation: More than 90% of dissections occur in men between the age of 40 and 60 with antecedent hypertension. Other causes of dissection.
Marfan syndrome causing cystic medial necrosis (second most common).
Ehlers - Danlos syndrome.
Inflammatory aortitis → Takayasu's disease, Giant cell arteritis.
Coarctation of aorta.
Normal woman during third trimester of pregnancy.
Congenital bicuspid aortic valve.