Four equipment are listed, out of which three are alike in some manner and one is different. Select the odd one.

Correct option is C

Solution:
The description is as follows:
Compass is an instrument for drawing circles and arcs and measuring distances between points, consisting of two arms linked by a movable joint, one arm ending in a point and the other usually carrying a pencil or pen.
All the other options (Test Tube, Dropper, and Beaker) are laboratory equipment used in scientific experiments.
The odd one out is;
(c) Compass.