Question

A device by which each type in a group may be identified, is known as(1) Lock
(2) Formula
(3) Solution
(4) Key

Answer 1

Heya!!

_____________________________

A device by which each type in a group may be identified is known as key.

Option D is the answer.

Hope this helps you❤

Answer 2

Option D :- Key.

Hope it help's uh...