A sample of water when tested for hardness, gave total hardness value of 450 mg/l, and alkalinity value of 150 mg/l (on CaCO3 scale) respectively. The carbonate and noncarbonate hardness of the sample (in mg/l units) are respectively:
1
150 ; 450
2
600 ; 450
3
150 ; 300
4
600 ; 300