Mixture X = 0.02 mol of $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5{\mathrm{SO}}_4\right]$ and 0.02 mol of $\left[\mathrm{Co}{\left({\mathrm{NH}}_3\right)}_5\mathrm{Br}\right]{\mathrm{SO}}_4$ was prepared in 2 litre of solution 

1 litre of mixture X + excess ${\mathrm{AgNO}}_3\to \mathrm{Y}$
1 litre of mixture X + excess ${\mathrm{BaCl}}_2\to \mathrm{Z}$
Number of moles of Y and Z are

• A

  0.01, 0.01

• B

  0.02, 0.01

• C

  0.01, 0.02

• D

  0.02, 0.02