Microbiology General 8cdd1c99 C1 esterase inhibitor deficiency causes ? A Neisseria infection B Hereditary angioneurotic edema C Hemolytic disease D Hemolytic uremic syndrome High-Yield Explanation Ans. is 'b' i.e., Hereditary angioneurotic edema Hereditary angioneurotic edema is due to C1 inhibitor (CI esterase inhibitor) deficiency.