Consider the following statements: I. The equation of lowest degree with rational coefficients, one of whose roots is $\sqrt{7}+\sqrt{3}$ is $x^{4}-20x^{2}+16=0$. II. The equation of lowest degree with rational coefficients, one of whose roots is $\sqrt{2}+i\sqrt{3}$ is $x^{4}+2x^{2}+25=0$.

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