Which of the following reactions `"involves"//"involve"` carbanion as the reaction intermediate?

Options

A. `H_3C-underset(O)underset(||)C-H overset(OH^(-))to`
B. `H-underset(O)underset(||)C-H overset(OH^(-))underset("conc.")to`
C.
D. `H_3C-underset(O)underset(||)C-H overset(Al(OEt)_3)to`

Answer

A, C

Explanation

`alpha`-H is required in basic medium in compounds with multiple bond containing functional group, for carbanion formation.