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oint frac text z ^2 - 4 text z ^2 +...

This question belongs to Engineering Maths Complex Variable
Complex Variable
?

$$\oint {\frac{{{{\text{z}}^2} - 4}}{{{{\text{z}}^2} + 4}}{\text{dz}}} $$   evaluated anticlockwise around the circle |z - i| = 2, where $${\text{i}} = \sqrt { - 1} ,$$   is

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Correct Answer: Option A
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