Which of the following chemicals is/are poisonous and no longer used in making the tips of matchsticks these days?
a. White phosphorus b. Antimony trisulphide c. Potassium chlorate
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Which of the following chemicals is/are poisonous and no longer used in making the tips of matchsticks these days?
a. White phosphorus b. Antimony trisulphide c. Potassium chlorate