Which casting among the following is allowed for the code given below? class A { public :int a; } class B:public A { int b; } main() { B b=new A(); //casting 1 A a=new B(); //casting 2 }

• A. Casting 1
• B. Casting 2
• C. Casting 1 and casting 2
• D. Casting 1 nor casting 2