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