Which Of The Following Code Correctly Represents The Function #1760

 #include <stack> void reverseStack(stack<int> &input, stack<int> &extra) { while(input.size()!=0) { extra.push(input.top()); input.pop(); } input.swap(extra); } 

 #include <stack> void reverseStack(stack<int> &input, stack<int> &extra) { while(input.size()!=0) { extra.push(input.top()); input.pop(); } extra.swap(input); }

 #include <stack> void reverseStack(stack<int> &input, stack<int> &extra) { while(input.size()!=0) { input.pop(); extra.push(input.top()); } extra.swap(input); }

 #include <stack> void reverseStack(stack<int> &input, stack<int> &extra) { while(input.size()==0) { input.pop(); extra.push(input.top()); } extra.swap(input); }