In a meter bridge (shown in the figure), the null point is found at a distance of 33.7 cm from A. If now a resistance of 12 $\Omega$ is connected in parallel with S, the null point occurs at 51.9 cm. The values of R and S are respectively:

$1.<mspace\; width="1em"></mspace>13.5<mspace\; width="1em"></mspace>\Omega ,<mspace\; width="1em"></mspace>6.86<mspace\; width="1em"></mspace>\Omega$
$2.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>13.5<mspace\; width="1em"></mspace>\Omega ,<mspace\; width="1em"></mspace>13.5<mspace\; width="1em"></mspace>\Omega$
$3.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>6.86<mspace\; width="1em"></mspace>\Omega ,<mspace\; width="1em"></mspace>6.86<mspace\; width="1em"></mspace>\Omega$
$4.<mspace\; width="1em"></mspace><mspace\; width="1em"></mspace>6.86<mspace\; width="1em"></mspace>\Omega ,<mspace\; width="1em"></mspace>13.5<mspace\; width="1em"></mspace>\Omega$