Q27

MCQ2 marks, −0.67

Consider the control flow graph shown.

Which one of the following choices correctly lists the set of live variables at the exit point of each basic block?

(A)

$\text{B1: { }, B2: {a}, B3: {a}, B4: {a}}$

(B)

$\text{B1: {i, j}, B2: {a}, B3: {a}, B4: {i}}$

(C)

$\text{B1: {a, i, j}, B2: {a, i, j}, B3: {a, i}, B4: {a}}$

(D)

$\text{B1: {a, i, j}, B2: {a, j}, B3: {a, j}, B4: {a, i, j}}$

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