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The inner diameter of a small test tube can be measured a...

The inner diameter of a small test tube can be measured accurately using a

A.

Micrometres screw gauge

B.

Pair of dividers

C.

Metre rule

D.

Pair of vernier calliper

Correct answer is D

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