1.

To carry out above convertion reagent used in decreasing order.

Answer»

`Na//liq.NH_(3),CHBr_(3)//NAOH(DELTA)`
`H_(2)//Pd-CaCO_(3),CHBr_(3)//NaOH(Delta)`
`Na//liq.NH_(3),CHBr_(3)//NaOH`
`H_(2)//Pd-CaCO_(3),CHBr_(3)//NaOH`

Solution :(B)


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