protected inheritance and reinterpret_cast

[chamika.deshan]

Hello
Is this safe?
In a API I am using have a protected inheritance of a class

class B
{
public :
 method();
}
class C : protected Class B
{

}

I need to access those pulbic methods in Class B
So is this ok and safe?

C* x = new C();
B* prt = reinterpret_cast<B*>(x);
prt->method();