A
B
C
D
Grignard reagent
Clemmensen reduction
Rosenumund reduction
Wolf- Kishner reduction
1.
2.
3.
4.
5.
H2/Pd−BasO4
N2H4|KOH|CH2−OH
CH3MgX
Zn−Hg|conc.HCl
H2|Ni
A B C D
(a) 3 4 2 1
(b) 3 4 1 2
(c) 2 1 4 5
(d) 5 3 2 1