Which of the following ketones will NOT give | vedclass

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(C) Enamine formation is a nucleophilic addition-elimination reaction between a carbonyl compound (having at least one $\alpha$-hydrogen) and a second

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$Di-tert-butyl \ ketone$ $((t-Bu)_2CO)$

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(C) Enamine formation is a nucleophilic addition-elimination reaction between a carbonyl compound (having at least one $\alpha$-hydrogen) and a secondary amine.In the case of $Di-tert-butyl \ ketone$ $((t-Bu)_2CO)$,the carbonyl carbon is highly sterically hindered by two bulky $tert-butyl$ groups.Due to this extreme steric hindrance,the secondary amine cannot approach the carbonyl carbon to initiate the nucleophilic attack,thus preventing the formation of an enamine.

Which of the following ketones will $NOT$ give an enamine upon treatment with secondary amines?

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