This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'C1 esterase inhibitor deficiency causes - \nSelect and explain. \nA. Neisseria infection, B. Hereditary angioneurotic edema, C. Hemolytic disease, D. Hemolytic uremic syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., Hereditary angioneurotic edema o Hereditary angioneurotic edema is due to Ci inhibitor (Cj esterase inhibitor) deficiency.Complement Deficiencies and Associated DiseasesComponentAssociated DiseasesCLASSIC PATHWAYClq,Clr,ClS,C4C2Cl inhibitorImmune-complex syndromes, "pyogenic infections"Immune-complex syndromes, "few with pyogenic infections"Rare immune-complex diseases, few with pyogenic infections,Hereditary angioneurotic edemaC3 AND ALTERNATIVE PATHWAYC3.C3DProperdinIHImmune-complex syndrome, "pyogenic infections", Neisseria infectionsPyogenic infections. Neisseria infectionsNeisseria infectionsPyogenic infectionsHemolytic uremic syndromeMEMBRANE ATTACK COMPLEXC5, C6, C7, C8C9Recurrent Neisseria infections, immune-complex diseaseRare Neisseria infections', 'role': 'assistant'}]