which of the following is an example of rational algebraic expression

[tex] a \:.)\frac{1}{a ^{6} } [/tex]
[tex]b.) \: \frac{ {c}^{4} }{ \sqrt{3} } [/tex]
[tex]c.) \: \frac{m + 2}{0} [/tex]
[tex]d.) \: \frac{3x}{2 - 2} [/tex]

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