Assume the following sample (pseudo) code snippet: 

1. read(a, b);
2. if (a == 2 && b == 2)
3.    c = a + b;
4. else
5.    c = 0;
6. print(c);

Which of the mutants listed below would be found to be a killed mutant after applying the following test case?

Test case:

Input a: 2, Input b: 2, Output c: 4