\( (X),(Y),(Z) \) are elements in the third period. Oxide of \( (X) \) is ionic, that of \( (Y) ...

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\( (X),(Y),(Z) \) are elements in the third period. Oxide of \( (X) \) is ionic, that of \( (Y) \) is amphoteric, and of \( (Z) \) a giant molecule. \( (X),(Y) \) and \( (Z) \) will have atomic numbers in the order:
(a) \( (X)(Y)(Z) \)
(b) \( (Z)(Y)(X) \)
(c) \( (X)(Z)(Y) \)
(d) \( (Y)(X)(Z) \)
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