Which of the following is not correct? (a) In haloarenes, the electron pairs on halogen atom are in conjugation with π-electrons of the ring. (b) The carbon-magnesium bond is covalent and non-polar in nature. (c) During SN 1 reaction, the carbocation formed in the slow step being sp2 hybridised is planar. (d) Out of CH2= CH-Cl and C6H5CH2Cl, C6H 5CH2Cl is more reactive towards SN 1 reaction
