Name the instrument which can measure accurately the following —

1. the diameter of a needle,
2. the thickness of a paper,
3. the internal diameter of the neck of a water bottle,
4. the diameter of a pencil.

The given physical quantities can be measured accurately with the help of the following instruments —

1. the diameter of a needle — screw gauge.
2. the thickness of a paper — screw gauge.
3. the internal diameter of the neck of a water bottle — vernier callipers.
4. the diameter of a pencil — screw gauge.