Which of the following conversions is a Hofmann elimination reaction?
- A$RCONH_2 \xrightarrow{Br_2, KOH_{(aq)}} RNH_2$
- B$RNH_2 \xrightarrow[\text{excess}]{RX} R_4NX$
- C$R_4NX \xrightarrow[\Delta]{\text{moist } Ag_2O} \text{Alkene} + R_3N$
- D$RCN \xrightarrow{Na / C_2H_5OH} RCH_2NH_2$
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What will be the products $A$,$B$,and $C$ in the following reaction sequence?
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