Barney's Mother Gave Birth to Him When She Was 25

Multiple Choice

Barney's mother gave birth to him when she was 25 years old.She drank heavily during her pregnancy.As a result,Barney is short.He also has learning disorders and displays some facial abnormalities.Which of the following condition is Barney most likely suffering from?

A) Tay-Sachs disease
B) Phenylketonuria
C) Down syndrome.
D) Fetal alcohol syndrome