What is the reduction factor of galvanometer . The amount of of current required to produce $45^{\circ}$ deflection in a galvanometer is defined as it reduction factor.

Question

$\begin{array}{1 1} \text{Amount of current required to produce $90^{\circ}$deflection } \\ \text{Amount of current required to produce $0^{\circ}$ deflection} \\ \text{Amount of current required to produce $45^{\circ}$ deflection} \\ \text{Amount of current required to produce $30^{\circ}$} \end{array}$