The value of $\lim_{n \to \infty} \frac{\sum_{r=0}^{n} {}^{2n}C_{2r} \times 3^{r}}{\sum_{r=0}^{n-1} {}^{2n}C_{2r+1} \times 3^{r}}$ is
(a) 0
(b) 1
(c) $\sqrt{3}$
(d) $(\sqrt{3}-1)/(\sqrt{3}+1)$
(c) $\sqrt{3}$
The value of $\lim_{n \to \infty} \frac{\sum_{r=0}^{n} {}^{2n}C_{2r} \times 3^{r}}{\sum_{r=0}^{n-1} {}^{2n}C_{2r+1} \times 3^{r}}$ is\\
(a) 0\\
(b) 1\\
(c) $\sqrt{3}$\\
(d) $(\sqrt{3}-1)/(\sqrt{3}+1)$