# The distance of a point p from a point source of light $S_1$ is $100. 1243\;cm$ and from another point source $S_2$ is $100.1664\;cm$ Find $(S_2P-S_1P)$ and $(S_2P +S_1P)$ correct upto the same number of significant figures.
$\begin{array}{1 1}(A)\;200\;cm \\(B)\;23 \;cm \\(C)\;98 \;cm \\(D)\;25\;cm \end{array}$