How much memory will allocated?

class A
{
    public A()
    {
        Console.WriteLine("Default A");
    }

    public A(int a)
    {
        Console.WriteLine("Parameterized A");
    }
}

class B : A
{
    public B()
    {
        Console.WriteLine("Default B");
    }

    public B(int a)
    {
        Console.WriteLine("Parameterized B");
    }
}

How much memory will allocate if we call:

A a = new B();

and

A a = new A();