C1 esterase inhibitor deficiency causes ?: (A) Neisseria infection, (B) Hereditary angioneurotic edema, (C) Hemolytic disease, (D) Hemolytic uremic syndrome
Answer is B. Ans. is 'b' i.e., Hereditary angioneurotic edema Hereditary angioneurotic edema is due to C1 inhibitor (CI esterase inhibitor) deficiency.