Consider the following sequence of reactions.


The correct statement(s) is / are

• A

  $\mathbf{X}$ is a mixture of almost equal amounts of two isomers.
• Correct answer
  B

  $\mathbf{Y}$ is a basic compound.
• Correct answer
  C

  $\mathbf{Z}$ is a racemic mixture.
• Correct answer
  D

  $\mathbf{Q}$ is 3,4-dimethoxybenzoic acid.

Hence, the correct answer is options: 'B', 'C', 'D'.