A) \[\frac{1}{ab}\]
B) \[{{a}^{2}}+{{b}^{2}}\]
C) \[\frac{1}{{{a}^{2}}+{{b}^{2}}}\]
D) \[{{a}^{2}}{{b}^{2}}+1\]
E) None of these
Correct Answer: C
Solution :
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