The conversion of propan-1-ol to n-butylamine involves the sequential addition of reagents. The correct sequential order of reagents is:
(i) \( \mathrm{SOCl_2} \) (ii) \( \mathrm{KCN} \) (iii) \( \mathrm{H_2} \) / Ni, \( \mathrm{Na(Hg)} \)/ \( \mathrm{C_2H_5OH} \)
(i) \( \mathrm{HCl} \) (ii) \( \mathrm{H_2} \) / Ni, \( \mathrm{Na(Hg)} \)/ \( \mathrm{C_2H_5OH} \)
(i) \( \mathrm{SOCl_2} \) (ii) \( \mathrm{KCN} \) (iii) \( \mathrm{CH_3NH_2} \)
(i) \( \mathrm{HCl} \) (ii) \( \mathrm{CH_3NH_2} \)