Sonu has $$N/2$$ HCl solution and Monu has $$N/10$$ HCl solution. They are asked to prepare $$2\ \text{litres}$$ of $$N/5$$ HCl solution. What volume of two solutions be mixed?

A

$$(0.5+1.5)\ \text{litre}$$

B

$$(1.0+1.0)\ \text{litre}$$

C

$$(0.3+1.7)\ \text{litre}$$

D

$$(0.2+1.8)\ \text{litre}$$