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Multiple Choice

A boy was trying to read the thermometer by holding its bulb. His father told him that this method is incorrect and advised him not to hold the bulb of the thermometer while reading it. Why is it so?

  1. The bulb will break off easily.
  2. It will give a wrong reading.
  3. Mercury will come down to the bulb.
  4. The bulb will expand on holding.
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