The total hardness value obtained from the complete analysis of water sample was found to be 120 mg / l. If the value of carbonate hardness is 50 mg / l, the non-carbonate hardness and alkalinity are, respectively
1
170 mg / l and 70 mg / l
2
170 mg / l and 50 mg / l
3
70 mg / l and 50 mg / l
4
50 mg / l and 70 mg / l