Examine given sequence of reaction carefully :
`overset(Sn+HCl)to A overset(HNO_(2))to Boverset(H_(2)O)toCunderset(100^(@)) overset(Conc. H_(2)SO_(4))toD underset("excess")overset(Br_(2)+ FeBr_(3))toE`
Identify product E of the reaction :
A.
B.
C.
D.
