A compound with molecular formula C
9H
10O
2 exhibits a triplet at δ 1.2 (3H), a quartet at δ 2.6 (2H), a doublet at δ 7.3 (2H), a doublet at δ 8.0 (2H) and a singlet at δ 11 (1H) in its
1H NMR spectrum. What is the structure for this compound?

◦ I
◦ II
◦ III
◦ IV
◦ V