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

1. nobelium (No) and lawrencium (Lr)
2. neptunium (Np) and lawrencium (Pu)
3. actinium (Ac) and thorium (Th)
4. berkelium (Bk) and californium (Cf)

Correct answer: neptunium (Np) and lawrencium (Pu)

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