A 6 V cell with $0.5 \Omega$ internal resistance, a 10 V cell with $1 \Omega$ internal resistance and a $12 \Omega$ external resistance are connected in parallel. The current (in ampere) through the 10 V cell is :

Question

$$\begin {array} {1 1} (a)\;0.60 & \quad (b)\;2.27 \\ (c)\;2.87 & \quad (d)\;5.14 \end {array}$$