What happens when this C++ program is compiled?

[answerhappygod]

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;
class A
{
int a;
public:
A(){}
};
 
class B: public A
{
int b;
public:
B(){}
};
 
void func()
{
B b;
throw b;
}
 
int main()
{
try{
func();
}
catch(A a){
cout<<"Caught A Class\n";
}
catch(B b){
cout<<"Caught B Class\n";
}
}
a) The program compiles successfully without any errors or warnings
b) Compile-time error occurs
c) The program compiles successfully with warnings
d) The program gives both errors and warnings