Firstly an object of DemoAbstract will be created.
When you call System.out.println(obj.sumOfTwo(3,7)) then it will return 10
When you call System.out.println(obj.sumOfThree(4,3,19)) then it will return 26
Lastly, when you call obj.disp() then "Method of class Sum" will be printed.
So, Option (A) is Correct.