This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology and Rheumatology, Subject name: Medicine
All of the following can cause aplastic anaemia except: 
Select and explain. 
A. Fanconi's anaemia, B. Wiskott-Aldrich syndrome, C. Dyskeratosis congenital, D. Reticular dysgenesis
B: Wiskott-Aldrich syndrome
Answer: B: Wiskott-Aldrich syndrome 
Explanation: Ans: B (Wiskott-Aldrich syndrome) Ref: Harrison's 18th ed, pg 887Explanation:Inherited CytopeniasAcquired CytopeniasFanconi's anemiaDyskeratosis congenitalShwachman-DiamondsyndromeReticular dysgenesisAmegakaryocytic thrombocytopeniaFamilial aplastic anemiasPreleukemia (monosomy 7)Nonhematological(Down. Dubowitz. Seckel)Aplastic anemiaSecondary To :RadiationDrugs and chemicalsViruses: EBV; non A.B.C Hepalitis,Parvovirus B19. HIVlmmune diseases-Eosinophilic fasciitis. hyperimtnunoglobulinemia. thy-momaPNHPregnancyIdiopathicCytopenias: Congenital PRCA(Diamond- Blackfan syndrome)Kostmann's syndromeSchwachman-Diamond syndromeReticular dysgenesisAmegakaryocytic thrombocytopeniaThrombocytopenia withabsent radiiCytopeniasPRC ADrugs and toxinsPure white cell aplasiaIdiopathic amegakaryocytic thrombocytopeniaWiskott-Aldrich Syndrome (WAS)X-linked recessive, due to WASP gene mutation; immune dysfunction affecting T lymphocyteRecurrent bacterial infections, eczema, bleedingPredisposes to lymphoma and autoimmune disordersDiagnosed by intracellular immunofluroscence analysis of WAS protein (WASP)Treatment: Prophylactic antibiotics, IgG supplementation, topical treatment of eczemaSplenectomy for thrombocytopeniaAllogenic HSCT is curative