Which of the following facts about the complex CrNH36Cl3 is wrong?

ln [Cr(NH3)6]3+, Cr exists as Cr3+ ion. The outer orbital electronic configuration of Cr is 3d3 4s0. The orbital diagram is represented byHere, X indicates lone pair of NH3 donated to Cr. Hence,(a) d2sp3-hybridization, octahedral. Thus, correct.(b) There are three unpaired electrons, hence paramagnetic. Thus, correct.(c) d2sp3-inner orbital complex, thus incorrect.(d) Due to ionizable Cl- ions, white precipitate with AgNO3, thus correct.Therefore, (3) is wrong.