99.  A moving coil galvanometer of resistance 20 $\Omega$ gives a full scale deflection when a  current of 1 mA is passed through it.  It is to be converted into an  ammeter reading 20 A on full  scale deflection.  If shunt wire of 0.005 $\Omega$ only is available then what resistance should be connected in series with the galvanometer coil.
$$\begin{gathered} 1. 99.955\Omega \\ 2. 79.995\Omega \\ 3. 59.295\Omega \\ 4. 19.955 \Omega \end{gathered}$$