Which of the following substances cause ...

Which of the following substances cause temporary hardness in water?
` 1. Mg(HCO_3)_2 2. Ca (HCO_3)_2 3. CaCl_2 4. MgSO_4`
Select the correct answer using the code given below.

3 and 4

2 and 3

1 and 4

1 and 2

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Which of the following substances cause temporary hardness in water? ` 1. Mg(HCO_3)_2 2. Ca (HCO_3)_2 3. CaCl_2 4. MgSO_4` Select the correct answer using the code given below.

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Which of the following substances cause temporary hardness in water?
` 1. Mg(HCO_3)_2 2. Ca (HCO_3)_2 3. CaCl_2 4. MgSO_4`
Select the correct answer using the code given below.