In the reaction sequences `2CH_(3)CHO overset(OH^(-))toA overset(Delta)toB` the product B is

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In the reaction sequences `2CH_(3)CHO overset(OH^(-))toA overset(Delta)toB` the product B is A. `CH_(3)- ... `CH_(3)-overset(O)overset(||)(C)-CH_(2)`

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