Words given on the left side of (::) are related with each other by some Logic/Rule /Relation. Select the missing word/word pair on the right side of (::) from the given alternatives based on the same Logic/Rule/Relation.

Plumbline : Mason :: ?

Saw : Carpenter

Plumbline : Mason :: ?

The logic;

The first item is a tool associated with a particular profession or trade.

A plumbline is a tool used by a mason

similarly,

A saw is a tool used by a carpenter.