Chain isomer of cyclobutene is

1.	Chain isomer of cyclobutene is
Answer» `CH_(3)CH_(2)CH=CH_(2)` `CH_(3)CH_(2)CH=CH-CH_(3)` `CH_(3)-UNDERSET(CH_(3))underset(\|)C=CH_(2)` SOLUTION : are chain ISOMERS because there is a differ in the carbon chain.

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