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Choose the correct option 

  1. A clinical thermometer should be washed using water before and after use
  2. A clinical thermometer should be washed using antiseptic solution before and after use
  3. A clinical thermometer can be used after it is heated by fire
  4. None of the above
Correct Answer: Option(b)
A clinical thermometer is a thermometer used to measure human body temperature. Most old ones use mercury thermometer. It is accurate and sensitive, because it has a narrow place where the mercury level rises very fast.
Medical thermometers are cleaned before and after each use, with alcohol or antiseptic so as to prevent infections, thus option is correct.

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