Choose the correct alternative for the given relation.
$6 : 18 :\, : 4 : \,?$
$2$
$6$
$8$
$16$
The relationship is $x : -y$
Drill : Bore : : Sieve : ?
Oak : Coniferous
Expend : Replenish
Curtain : Drapery
Indolence is related to work in the same way taciturn is related to……..
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