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Dinesh khalmaniya 1 Best Answer
option B d7- [Co(NH3)6]2+ has centre of symmetry so it is leporte forbidden while spin allowed because spin is forbidden only for d5 HS complex. d6-[Co(NH3)5Cl]2+ not has centre of symmetry so it is laporte as well as spin allowed. [MnCl4]2- has d5 configuration so it is spin forbidden while laporte allow as centre of symmetry absent. so option B is correct