The option showing both the complexes obeying the 18e- rule is

1
[(n5-C5H5) RuCl(PPh3)2] and [(n5 - C5H5)2ZrCl2]
2
[IrCl(CO)(PPh3)2] and [Co2 (CO)8]
3
[Re(CO)5 (PF3)]+ and [Ni(NH3)6]2+
4
[(n5-C5H5) (n3 - C5H5)Fe(CO)] and [(n3 - allyl)Mn(CO)4]

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