Question

Aneroid barometer
A. Uses liquid
B. do not use any liquid
C. both
D. none.

Answer 1

A thin, flexible metal box called an aneroid cell (capsule) is utilized by the Aneroid barometer. An effective spring stops the evacuated capsule (or normally multiple capsules, piled to sum up their movements) from collapsing. The cell is induced to expand or contract by slight changes in external air pressure. This expansion and contraction control mechanical levers such that the capsule's tiny motions are intensified and seen on the aneroid barometer 's face.

Complete step by step answer:
An aneroid barometer is an instrument used as a non-liquid tool for measuring strain. It was invented by the French physicist Lucien Vidi in $1844$ . A thin, lightweight metal box called an aneroid cell (capsule) is used in the aneroid barometer, made of an alloy of beryllium and copper. An effective spring stops the evacuated capsule (or normally multiple capsules, piled to sum up their movements) from collapsing. The cell is induced to expand or contract by slight changes in external air pressure. This expansion and contraction control mechanical levers such that the capsule's tiny motions are intensified and seen on the aneroid barometer 's profile. Many versions have a needle that is manually set and used to mark the current measurement so that a transition can be seen. In homes, this sort of barometer is popular.
A device used to measure air pressure is a barometer. The liquid and aneroid barometer are both forms. The Aneroid Barometer uses no liquid at all.
The 'aneroid' term means dry. As they do not use any fluid in them, they are considered dry. They work on the compression and bulging of the diaphragm.

So, the correct answer is “Option B”.

Note:
In fact, barometers and pressure altimeters (the most simple and common type of altimeter) are the same instruments, but they are used for various purposes. The altimeter is meant to be used at various heights, referring to the height of the corresponding air pressure, while the barometer is held at the same level and measures small changes in pressure caused by temperature and weather conditions.