The following are polynomials, EXCEPT

(A. )⬇️
x² + 4

(B. )⬇️
[tex] \frac{4}{x} [/tex]
(C. )⬇️
[tex] \frac{x + y}{4} [/tex]
(D. )⬇️

- 3x² - 4y + 3

Please help.

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