Get type of a field of class

I have classes like this:

class A
{
    public int x;
    public int y;
}
class B
{
    public int x;
    public int y;
}
class C
{
    public A a;
    public B b;
}

public class Test<T> where T : class, new()
{
     public Test()
     {
        FieldInfo[] x = typeof(T).GetFields().ToArray();
        Type y = x[0].GetType();
     }
}

When I declare Test<C> c = new T typeof(T).GetFields().ToArray() Returns the two fields a of type A and b of type B as expected. but when I want to get type of first field itself, like this: Type y = x[0].GetType();, the value of y is System.Reflection.RtFieldInfo and not A

Why is it so? I need to get to the class A so that I can get its fields and ...