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Which of the following statement(s) is/are correct?
(i) The atomic and ionic radii of alkaline earth metals are smaller than those of the corresponding alkali metals in the same periods.
(ii) Second ionisation enthalpies of the alkaline earth metals are smaller than those of the corresponding alkali metals.
(iii) Compounds of alkaline earth metals are more extensively hydrated than those of alkali metals
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (i), (ii) and (iii)
\( \mathrm{P} \)
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