Please explain why the answer to the 11th one is option 3

Please explain why the answer to the 11th one is option 3 CH3 O OH — CH — — CH — CHO CH3 CH3 EXERCISE CH2 - Et OH Which of the following reagent would work best for the above conversion? (1) zn-Hg / HCI (3) NH2NH2/OH- (4) NaBH4 12. Among the following which species will undergo reaction with 50% NaOH to alcohol? (1) Acetic acid , (3) Phenol (2) Propanol (4) Benzaldehyde What is the increasing order of reactivity of the following towards HCN additic

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Because the reactant is a ketone and it will undergo reduction by hydrazime to form oxime first and then the product
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This is wolf kishner reaction
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