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Q)

# In the given transformation, which of the following is the most appropriate reagent ? <br> <img src="http://clay6.com/mpaimg/993_a.jpg "/>

( A ) $NaBH_4$
( B ) $Zn-Hg/HCl$
( C ) $NH_2NH_2,\overset{(-)}{O}H$
( D ) $Na, Liq. NH_3$