MCQ
Product $(Y)$ is


- Acis $-2 -$ butene
- ✓trans $-2-$ butene
- C$1-$ butene
- DIso - butene


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$CH_3-CH_2-CHO \, + $ (image) $\xrightarrow[{0 - 5{}^ \circ C}]{{O\mathop H\limits^ \ominus }} \, ?$
