$$\mathrm{NaOH}$$ solution is added dropwise to $$\mathrm{HCl}$$ solution and the conductance of the mixture is measured after addition of each drop. The variation of conductance with volume of $$\mathrm{NaOH}$$ added is as shown in the adjacent graph.

The statement that is not true for the above is

A

decrease in conductance from X to Y is due to decrease in $$[\mathrm{H^+}]$$

B

point Y represents the equivalence point of titration

C

$$\mathrm{Na^+}$$ has the higher equivalence conductance than $$\mathrm{H_3O^+}$$

D

segment YZ represents the conductance due to ions from $$\mathrm{NaCl}$$ and $$\mathrm{NaOH}$$ in solution