$(A)$ and $(B)$ in the following reaction sequence are:
$RR'C=O$ $\xrightarrow{HCN} (A)$ $\xrightarrow{B} RR'C(OH)CH_2NH_2$
$RR'C=O$ $\xrightarrow{HCN} (A)$ $\xrightarrow{B} RR'C(OH)CH_2NH_2$
- A$(A) = RR'C(OH)CN, (B) = LiAlH_4$
- B$(A) = RR'C(OH)COOH, (B) = NH_3$
- C$(A) = RR'C(OH)CN, (B) = H_3O^{+}$
- D$(A) = RR'C(OH)CN, (B) = H_2/Ni$
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