As \((-2 \hat{i}-3 \hat{j}) \times(3 \hat{i}-2 \hat{j})=13 \hat{k}\)
Hence option \((b)\) is the correct answer.
(ડાયઈલેકટ્રીક માધ્યમ માટે $\mu_{ r }=1$ આપેલ છે)
$\left(\epsilon_0=8.85 \times 10^{-12} \mathrm{C}^2 \mathrm{~N}^{-1} \mathrm{~m}^{-2}\right.$ લો.)