This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
A person present with recurrent swelling on face and lips due to emotional stress.likely cause is 
Select and explain. 
A. C1 esterase inhibitor deficiency, B. Allergy, C. Anaphylaxis, D. None of the above
A: C1 esterase inhibitor deficiency
Answer: A: C1 esterase inhibitor deficiency 
Explanation: Ref Robbins 9/e 238; 8/e p 235 Acquired angioedema due to deficiency of C1 esterase inhibitor, also called acquired angioedema and abbreted C1INH-AAE, is a rare syndrome of recurrent episodes of angioedema, without uicaria, which is associated with B cell lymphoproliferative disorders in some patients