求一句话的英文翻译，没有人比父母更理解孩子

Question

要求一定不能有任何语法错误，说的不生动没关系

我给的翻译是

There is no other better candidate who truely understand children than their parents.

Answer 1

No one understand their children better than their parents.

Answer 2

There is nobody who can understand their children than their parents .

Answer 3

No one can better understand the children than parents do.

Answer 4

No one will know the children better than their own parents