Must be True Question

Hi,

I am confused in Must be True Questions.
Must be true questions are same as Inference Questions ?
In inference questions we can't select answer choice that restates the statement given in stimulus.

But in Must be true questions we can restate the statement given in stimulus and also if stimulus is
fact of statements then one need to find the relation between the facts.

Can someone please let me know about restate of statement is correct in must be true questions or in inference questions.

Thanks
Anubhav