$\begin {array} {1 1} (1)\;\text{No. of turns in the coil} & \quad (2)\;\text{Resistance of the coil} \\ (3)\;\text{Magnetic moment of the magnet} & \quad (4)\;\text{Speed of approach of the magnet} \end {array}$

$\begin {array} {1 1} (a)\;1,2 & \quad (b)\;2 \\ (c)\;3,4 & \quad (d)\;1,3,4 \end {array}$