Which one of the following is a polynomial?

1.	Which one of the following is a polynomial?
A.	\[\frac{{{x}^{3}}}{9}-\frac{3}{{{x}^{-\,3}}}+\sqrt{x}\]
B.	\[{{x}^{3}}-\frac{3{{x}^{7/3}}}{^{3}\sqrt{x}}+\frac{{{x}^{-\,1/2}}}{{{x}^{1/2}}}\]
C.	\[{{x}^{2}}-3\sqrt{5x}+\sqrt{2}+{{x}^{-\,1}}\]
D.	\[\frac{{{x}^{3/2}}}{{{x}^{1/2}}}+\frac{2{{x}^{7/5}}}{{{x}^{2/5}}}+\frac{8{{x}^{2}}}{{{x}^{-1}}}\]
E.	None of these
Answer» E. None of these

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Which one of the following is a polynomial?

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