a. The program will output 'ctor service init doGet destroy'.
b. The program will output 'ctor init doGet destroy'.
c. The program will output 'ctor service doGet destroy'.
d. The program will output 'ctor init service doGet destroy'.
And the mock exam show b as the correct answer
But I think that there's no correct answer, since service() method is overriden
So correct answer would be: