Which of the following compounds has tetrahedral geometry? (a) $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{-2}$ (b) $\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{2-}$ (c) $\left[\mathrm{PdCl}_{4}\right]^{2-}$ (d) $\left[\mathrm{NiCl}_{4}\right]^{2}$
Find the vector equation of the line passing through the point with position vector and parallel to the vector Deduce the Cartesian equations of the line.