Q44

The following program is to be tested for statement coverage: begin if (a==b) {S1; exit;} else if (c==d) {S2;} else {S3; exit;} S4; end The test cases T1, T2, T3 and T4 given below are expressed in terms of the properties satisfied by the values of variables $a,\:b,\:c$ and $d$. The exact values are not given. T1: a, b, c and d are all equal T2: a, b, c and d are all distinct T3: a = b and c != d T4: a != b and c = d Which of the test suites given below ensures coverage of statements S1, S2, S3 and S4?