What minerals are useful in human life?

1) calcium
2) phosphorus
3) potassium
4) sodium
5) magnesium
6) iron
7) zinc
8) cobalt
9) copper
10) manganese
11) molybdenum
12) iodine
13) selenium
14) sulfur
15) chloride
16) boron
17) silicon
18) vanadium
19) nickel
20) arsenic
21) chrome



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