Two solutions of HCl, A and B, have concentrations of 0.5 N and 0.1 N respectively. The volume of solutions A and B required to make 2 litres of 0.2 N HCl are
1
0.5 L of A + 1.5 L of B
2
1.5 L of A + 0.5 L of B
3
1.0 L of A + 1.0 L of B
4
0.75 L of A + 1.25 L of B