Bob is parents have a child.But the child is neither his sister nor his brother.Who is the child?

问题描述:

Bob is parents have a child.But the child is neither his sister nor his brother.Who is the child?
A.Jeff B.Tom C.Bob D.Alice

选择C.Bob的父母有个孩子,但是这个孩子既不是他的姐妹也不是他的兄弟,这个孩子是谁?