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Solution


Q.

In the above reaction, left hand side and right hand side rings are named as ‘A’ and ‘B’ respectively. They undergo ring expansion. The correct statement for this process is:     [2023]
1 Ring expansion can go upto seven membered rings  
2 Only A will become 6 membered.  
3 Finally both rings will become five membered each  
4 Finally both rings will become six membered each  

Ans.

(4)