Concept:The volume of an irregular solid is found by the amount of liquid it displaces.
Explanation:A measuring cylinder contains water with a known level.
When the stone is fully immersed, the water level rises.
The rise in water level equals the volume of the stone.
This is called the displacement method.
A meter rule, vernier calliper, or micrometer screw gauge only measure lengths or regular shapes.
They cannot directly measure the volume of an irregular object.
So, the correct instrument is the measuring cylinder.
Answer:B. measuring cylinder