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B
NH2−(CH2)3−NH2
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C
COOH−(CH2)3−COOH
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D
NH2CO−(CH2)3−CONH2
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Solution
The correct option is ANH2−CH2−(CH2)3−CH2−NH2 Primary alkyl bromide on reacting with NaCN under nucleophilic substitution reaction. In this reaction both Br groups are replaced by CN molecule.
H2,Ni is a catalytic reducing agent. Nitrile get reduced to primary amines on reacting with H2,Ni.