Which of the Following Statements About Spina Bifida Is True

Multiple Choice

Which of the following statements about spina bifida is true?

A) Spina bifida (SB) is not influenced by the environment.
B) Spina bifida does not show any family clustering.
C) A gene associated with the neural tube defects has been identified in mice but no such gene exists in humans.
D) The human X chromosome contains the gene associated with neural tube defects.
E) A couple that has a child with spina bifida has an increased risk of having another child with spina bifida.