Hereditary angioneurotic edema is due to ?: (A) Deficiency of C1 inhibitor, (B) Deficiency of NADPH oxidase, (C) Deficiency of MPO, (D) Deficiency of properdin
Answer is A. Ans. is 'a' i.e., Deficiency of C1 inhibitor Hereditary angioneurotic edema is due to C1inhibitor (Ci esterase inhibitor) deficiency.