In C, do braces act as a stack frame?

Question

Hi guys,

If I create a variable within a new set of curly braces, is that variable popped off the stack on the closing brace, or does it hang out until the end of the function? For example:

void foo() {
   int c[100];
   {
       int d[200];
   }
   //code that takes a while
   return;
}

Will d be taking up memory during the code that takes a while section?