The number of signals that appear in the proton decoupled ${ }^{13} \mathrm{C} \mathrm{NMR}$ spectrum of benzonitrile $\left(\mathrm{C}_{7} \mathrm{H}_{5} \mathrm{N}\right)$ is
Answer
Answer (as printed): 5
The options are missing from the source scan for this question, so there is nothing here for this letter to point at. The letter is what the book printed.
Explanation
Answer: 5 — Benzonitrile carbons: ipso, ortho (2), meta (2), para and C≡N give 5 distinct ¹³C signals.