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‘A’ and ‘B’ respectively are: → − O H Zn ) 2 ( O ) 1 ( A 2 3 Ethane-1, 2-dicarbaldehyde + Glyoxal/Oxaldehyde → − O H Zn ) 2 ( O ) 1 ( B 2 3 5 – oxohexanal

1. 1-methylcyclohex-1, 3-diene & cyclopentene
2. Cyclohex-1, 3-diene & cyclopentene
3. 1-methylcyclohex-1, 4-diene & 1-methylcyclo-pent-ene
4. Cyclohex-1, 3-diene & 1-methylcyclopent-1- ene

Correct answer: Cyclohex-1, 3-diene & 1-methylcyclopent-1- ene

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