Which Genetic or Chromosomal Abnormality Below Is CORRECTLY Matched with Its

Which genetic or chromosomal abnormality below is CORRECTLY matched with its description?

A) Phenylketonuria-the child cannot produce a critical enzyme,resulting in an accumulation of poisons,in turn causing mental retardation
B) Tay-Sachs disease-a genetic disease producing abnormal red blood cells
C) Down syndrome-a neurodegenerative disorder;the brain tissues of the cortex degenerates resulting in the death of the child
D) Sickle-cell anemia-the child receives an extra chromosome;mental retardation results

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