MCQ
Which of the following are meso compounds


- A$I$ only
- ✓$III$ only
- C$I$ and $II$
- D$II$ and $III$

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$C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\xrightarrow{NaCN}$ $X\xrightarrow[heat]{{{H}_{3}}{{O}^{+}}}Y\xrightarrow[{{H}^{+}}]{C{{H}_{3}}C{{H}_{2}}OH}Z$