A micrometer has a resistance of 100 $\Omega$  and full-scale range of 50μA. It can be used as a voltmeter or as a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combinations (nearly)

To convert a galvanometer into a voltmeter, a resistance $R=\frac{V}{i_g}-G$ is connected in series with it.

For a voltmeter of 10V, $\mathrm{R}=\frac{10}{50\times {10}^{-3}}-100\cong 200\mathrm{k} \mathrm{\Omega }$
To convert galvanometer into an ammeter, resistance $S=i_{g}G/(i-i_g)$ is to be connected in parallel with galvanometer.