Answer
Diagram "A" shows the final volume of the balloon for that situation.
Work Step by Step
According to the Avogadro's law, if the pressure and the temperature are constant, the volume is directly related to the number of moles of the gas.
Therefore, if the neon gas is removed from the balloon, the number of moles will decrease, and the volume will also decrease.
Diagram "A" represents the reducing of the volume.