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Of the following reactions, how many re...

Of the following reactions, how many reaction, are used for the preparation of amines?
(a) `R-C-=N overset(LiAIh_(4))rarr` (b) `R-overset(O)overset(||)(C)-NH_(2)overset(LiAIH_(4))rarr`
(c) `R-overset(O)overset(|)(C)-NH_(2) overset(Br_(2)+overset(Theta)(OH))rarr` (d) `R-overset(O)overset(||)(C)-CH_(3)+H_(3)C-NO_(2)overset(NaOH)rarr`

(g) `R-overset(O)overset(||)(C)-NH_(2)overset(P_(2)O_(5))underset(D)rarr` (h) `R-CH_(2)-NO_(2) overset(H_(2),Ni)rarr`

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