Which of the following methods of preparation of amines will give s...

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Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?
(i) Reaction of nitrite with \( \mathrm{LiAlH}_{4} \).
(ii) Reaction of amide with \( \mathrm{LiAlH}_{4} \) followed by treatment with water.
(iii) Heating alkylhalide with potassium salt of phthalimide followed by hydrolysis.
(iv) Treatment of amide with bromine in aqueous solution of sodium hydroxide.
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