Which of the following on reaction with Grignard reagent followed by hydrolysis forms secondary alcohol?

1. HCHO
2. $\mathrm{CH}_3 \mathrm{CHO}$
3. $\mathrm{CH}_3-\mathrm{CO}-\mathrm{CH}_3$
4. $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CO}-\mathrm{CH}_3$

Asked in: MHT CET 2024 (03 May Shift 1)

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