Which molecule would have a 1H NMR signal that matches the following description? 4.7 ppm, 1H,…

Which molecule would have a 1H NMR signal that
matches the following description?
4.7 ppm, 1H, septet

Which molecule would have a HNMR signal that matches the following description? 4.7 ppm, 1H, septet Select one a. O b. O d