Compare lanthanoids and actinoids with respect to:
(i) electronic configuration.
(ii) oxidation state
a) Lanthanoids and actinoids have similar electronic configurations but different oxidation states.
b) Lanthanoids and actinoids have different electronic configurations but similar oxidation states.
c) Lanthanoids and actinoids have both similar electronic configurations and oxidation states.
d) Lanthanoids and actinoids have different electronic configurations and oxidation states.