What is it good for?与What it good for?什么区别呀?

What is it good for?与What it good for?什么区别呀?
What is it good for?与What it good for?什么区别呀?

What is it good for?与What it good for?什么区别呀?
后面一个句子是错的,因为没有谓语动词.