Which of the following is a $FALSE$ statement?
- ACarius tube is used in the estimation of sulphur in an organic compound.
- BCarius method is used for the estimation of nitrogen in an organic compound.
- CPhosphoric acid produced on oxidation of phosphorus present in an organic compound is precipitated as $Mg_2P_2O_7$ by adding magnesia mixture.
- DKjeldahl's method is used for the estimation of nitrogen in an organic compound.
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