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
All of the following factors predispose to Aoic dissection, Except: 
Select and explain. 
A. Systemic hypeension, B. Coarctation of aoa, C. In Ist trimester pregnancy, D. Takayasu's aeritis
C: In Ist trimester pregnancy
Answer: C: In Ist trimester pregnancy 
Explanation: Answer is C (In 1st trimester pregnancy) Aoic dissection is predisposed during Third trimester of pregnancy and not during the first trimester of pregnancy Risk factors / Predisposing factors for Aoic Dissection Systemic Hypeension and cystic medial necrosis Connective Tissue Disorders - Marfan's Syndrome - Ehler's Danlos Syndrome Inflammatory Aoititis - Takayasu aeritis - Giant cell aeritis Congenital Aoic Valve abnormalities - Bicuspid Aoic Valve Coarctation of Aoa Aoic trauma Third trimester of pregnancy