In one litre of pure water, $$44.4\text{ g}$$ of calcium chloride is dissolved. The number of ions in one millilitre of the resultant solution is

A

$$7.23\times10^{23}$$

B

$$7.23\times10^{20}$$

C

$$4.82\times10^{23}$$

D

$$4.82\times10^{20}$$