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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