1.

The reagents A, B and C respectively are

Answer»

`H_(2)//Pd`, PCC, `NaBH_(4)`
`NaBH_(4)`, alk. `KMnO_(4)`, `H_(2)//Pd`
`NaBH_(4)`, PCC, `H_(2)//Pd`
`H_(2)//Pd`, alk. `KMnO_(4)`, `NaBH_(4)`

Solution :(b):
`:.` A = `NaBH_(4)`, B = alk. `KMnO_(4)` and C = `H_(2)//Pd`. `NaBH_(4)` does not REDUCE double bond. However, CATALYTIC hydrogenolysis `(H_(2)//Pd)` reduces both double bond and the carbonyl group.


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