Failed to connect to MySQL: Access denied for user 'examnext_online'@'localhost' (using password: YES) Which of the following pair the EAN of central metal atom is not same - - Sarthaks eConnect

Which of the following pair the EAN of central metal atom is not same :-

`[Fe(CN)_6]^-3 and [Fe(NH_3)_6]^+3`

`[Cr(NH_3)_6]^+3 and [Cr(CN)_6]^-3`

`[FeF_6]^-3 and [Fe(CN)_6]^-3`

`Ni(CO)_4 and [Ni(CN)_4]^-2`