The following method of purification, where metal is converted to its volatile compound that gives pure metal is upon the decomposition :
a. Heating with a stream of carbon monoxide.
b. Heating with iodine.
c. Liquation
d. Distillation
Choose the correct option :
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
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