Physics Question from JEE Main 2024 · 27 January, Shift 2

Two charges of $-4\mu C$ and $+4\mu C$ are placed at the points $A(1, 0, 4)\,m$ and $B(2,-1, 5)\,m$ located in an electric field $\vec{E} = 0.20\hat{i}\,V/cm$. The magnitude of the torque acting on the dipole is $8\sqrt{\alpha}\times 10^{-5}\,Nm$, where $\alpha$ = :