Which of the following is not a typical cause of severe retardation?
A) genetically inherited defects such as fragile-X syndrome
B) poor prenatal nutritional habits by the mother
C) genetically-based diseases such as PKU
D) chromosomal abnormalities such as Down syndrome

Question

Quizplus · Accepted Answer

Poor prenatal nutritional habits may cause some developmental delays, but typically do not cause severe retardation. The other choices are all known causes of severe retardation.

Which of the Following Is Not a Typical Cause of Severe