The inner diameter of a small test tube can be measured accurately using a
- Micrometres screw gauge
- Pair of dividers
- Metre rule
-
Pair of vernier calliper
The correct answer is: D
Explanation
A vernier scale is a visual aid to take an accurate measurement reading between two graduation markings on a linear scale by using mechanical interpolation; thereby increasing resolution and reducing measurement
There is an explanation video available .