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a) 2,3,4,1

Explanation:

This type of instrument is very common when it is required to measure the mass of a body. We must first locate the mass in the measuring space of the instrument, without this first step it is impossible to balance the measuring scales of the instrument. Balance is achieved when an instrument cursor is aligned or in zeros with the instrument scale. Then proceed to read the values corresponding to unit then the part of Tenth and finally hundredth.

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