74. Which compound would be expected to show IR absorption at 2250 cm^-1？
(A) CH₃CH₂CH₂CO₂H
(B) CH₃CH₂CH₂CH₂OH
(C) CH₃C(O)O(O)CCH₃
(D) CH₃CH₂CH₂C(O)NH₂
(E) CH₃CH₂CH₂CN

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