1.

{:(" i. Alkali metals",,"(a) Lanthanides & Actinides"),("ii. Alkaline earth metals",,"(b) Group 3-12"),("iii. Transition elements",,"(c) Group 2"),("iv. Inner transition elements",,"(d) Group 1"):}

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SOLUTION :i-d, ii-c, iii-b, iv-a


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