Which compound would be expected to show intense IR absorption at 2250 cm^-1?

Name: Which compound would be expected to show intense IR absorption at 2250 cm -1 ?
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Question

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The intense IR absorption at 2250 cm-1 suggests the presence of a triple bond (C≡C or C≡N). Among the given compounds, only compound B contains a triple bond (a carbon-nitrogen triple bond in the molecule CN). Therefore, compound B is expected to show intense IR absorption at 2250 cm-1.

Which Compound Would Be Expected to Show Intense IR Absorption