নিচের কোনটি সঠিক?

$\hat{\mathrm{j}} \times \hat{\mathrm{k}}=-\hat{\mathrm{i}}$

$\hat{\mathrm{j}} \times \hat{\mathrm{k}}=\hat{\mathrm{i}}$

$\hat{\mathrm{j}} \times \hat{\mathrm{k}}=1$

$\hat{\mathrm{j}} \times \hat{\mathrm{k}}=-1$