Question:

The maximum number of possible oxidation states of actinoides are shown by:

Nobelium(No)and lawrencium(Lr)

Neptunium(Np)and plutonium(Pu)

Berkelium(Bk)and califormium(Cf)

Actinium(Ac)and throium(Th)

Correct option is D. Neptunium(Np) and plutonium(Pu) show maximum no. of oxidation states starting from +3 to +7 all oxidation states.