This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Diabetes mellitus is present in all except- \nSelect and explain. \nA. Fanconis anemia, B. Noonans syndrome, C. Ataxia telangiectasia, D. Myotonic dystrophy', 'role': 'user'}, {'content': "Answer: A \nExplanation: Type 1 diabetes *Immune-mediated *Idiopathic. Type 2 diabetes Other specific types *Geneticdefectsofb-cellfunction(seeBox21.6) *Geneticdefectsofinsulinaction(e.g.leprechaunism, lipodystrophies) *Pancreaticdisease(e.g.pancreatitis,pancreatectomy, neoplasticdisease,cysticfibrosis,haemochromatosis, f ibrocalculouspancreatopathy) *Excessendogenousproductionofhormonalantagoniststo insulin,e.g. Growthhormone-acromegaly Glucocoicoids-Cushing'ssyndrome Glucagon-glucagonoma Catecholamines-phaeochromocytoma Thyroidhormones-thyrotoxicosis *Drug-induced(e.g.coicosteroids,thiazidediuretics, phenytoin) *Uncommonformsofimmune-mediateddiabetes(e.g.IPEX (immunodysregulationpolyendocrinopathyX)syndrome) *Associatedwithgeneticsyndromes(e.g.Down'ssyndrome; Klinefelter'ssyndrome;Turner'ssyndrome;DIDMOAD (Wolfram'ssyndrome)-diabetesinsipidus,diabetesmellitus, opticatrophy,nervedeafness;Friedreich'sataxia;myotonic dystrophy). Gestational diabetes. DAVIDSON'S PRINCIPLES AND PRACTICE OF MEDICINE 22ND EDITION PAGE NO-807", 'role': 'assistant'}]