An unknown compound has the formula C8H10OS, and is known to contain a thiophene ring. The proton NMR spectrum of this compound is: δ0.98, triplet, 3H
Δ1) 74, multiplet, 2H
Δ2) 80, triplet, 2H
Δ7) 04, multiplet, 1H
Δ7) 55, multiplet, 2H
What is the structure of this unknown? 
A) I
B) II
C) III
D) IV
Correct Answer:
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