Match List I with List II:

List I (Complexes) List II (Hybridisation)
(a) [Ni(CO)₄] i. sp³
(b) [Cu(NH₃)₄]₂ ii. dsp²
(c) [Fe(NH₃)₆]₂ iii. sp³d²
(d) [Fe(H₂O)₆]₂ iv. d²sp³
a) (a-i), (b-iii), (c-ii), (d-iv)
b) (a-iii), (b-iv), (c-i), (d-ii)
c) (a-i), (b-ii), (c-iii), (d-iv)
d) (a-iv), (b-iii), (c-i), (d-ii)