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: Skin
Laboratory evaluation of a patient with recurrent lip edema shows decreased C4 and CIINH (quantity & function) with normal Clq. Diagnosis is 
Select and explain. 
A. Hereditary angioedema type II, B. Hereditary angioedema type I, C. Acquired AE type II, D. Acquired AE type I
B: Hereditary angioedema type I
Answer: B: Hereditary angioedema type I 
Explanation: B. i.e. Hereditary angioedema type I