This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
Single gene disorder 
Select and explain. 
A. Duchenne muscle dystrophy, B. Down syndrome, C. Turner syndrome, D. Klinefelter syndrome
A: Duchenne muscle dystrophy
Answer: A: Duchenne muscle dystrophy 
Explanation: (A) Duchenne muscle dystrophy MENDELIAN DISORDERS/SINGLE GENE DISORDERSAutosomal DominantAutosomal RecessiveX-linked RecessiveX-linked DominantFAP of colonAchondroplasiaAcute intermittent porphyriaHyperlipoproteinemia1.2,3,4HemorrhagicHSHuntington's dsMarfan's syndromeNeurofibromatosisOsteogenesis imperfectaPolydactylyvWDRetinoblastomaPeutz Zeghers syndromeOsteosclerosisMost inborn error of metabolism e.g.AlbinismAlkaptonuriaAgammaglobulinemia(Swiss type)Cystic fibrosisMaple Syrup Urine dsHemochromatosisWilson's dsPKULysosomal storage dsGlycogenesis, Gaucher's ds., PK deficiency21-Hydoxylase def,CAHb-thalessemiaSickle cell anemiaHirschsprung's diseaseHemophiliaColor blindnessG-6-PD def.(incompletely dominant (expression)DICGDAgammaglobulinemia (Bruton's)Duchenne's and Becker'sMuscle dystrophyRPHydrocephalusOrnithine transcarbamylase deficiencyVit-D resistant/ hypophosphatemicRicketsAlport syndromeFamilialHypophosphatemiaBlood group XgIncontinentia PigmentiFabry's DS