A proton NMR spectrum shows a signal at 7.2 ppm with a splitting pattern of a doublet. What can you infer about the proton environment?

The signal at 7.2 ppm indicates protons in an aromatic environment, and the doublet suggests that these protons are adjacent to one other proton. This answer is anchored to NMR spectroscopy (A-level only).

The signal at 7.2 ppm indicates protons in an aromatic environment, and the doublet suggests that these protons are adjacent to one other proton. is the best answer because it directly supports the AQA A-Level Chemistry objective to use proton NMR chemical shifts to identify proton environments. This reasoning is anchored to NMR spectroscopy (A-level only) in Nuclear magnetic resonance spectroscopy (A-level only), and it separates proton NMR from similar A-Level ideas rather than relying on a vague recall statement. Other options are weaker if they use the wrong evidence, calculation, mechanism, observation, unit, or conclusion for this subtopic.