18. Which of the following compound(s) would be expected to show a sharp and strong IR absorption peak at 61ba8df520f40.jpg?

 (I) CH3C= CCH3, (II) butane, (III) but-1-ene, (TV) CH3CH2C = CH, (V) butan-1-01 


(A) I and III
(B) III only
(C) IV only
(D) IV and v
(E) I, IV, and V.

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統計： A(0), B(1), C(0), D(1), E(1) #2823982