A box, when hung from a spring balance shows a reading of 50 ~kg . If the same box is hung from the same spring balance inside an evacuated chamber, the reading on the scale will be

Options

1. A50 ~kg because the mass of the box remains unchanged
2. B50 ~kg because the effect of the absence of the atmosphere will be indentical on the box and the spring balanc
3. CLess than 50 ~kg because the weight of the column of air on the box will be absent
4. DMore than 50 ~kg because the atmospheric buoyancy force will be absent