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M: +1.00/-0.33

Which of the following substances cause temporary hardness in water?
1) Mg(HCO3)2
2) Ca(HCO3)2
3) CaCl2
4) MgSO4
Select the correct answer using the code given below.

[CDS-I 2018 General Awareness(PYSP)]
A
B
C
D
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