Fluorobenzene $\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{~F}\right)$ can be synthesized in the laboratory

• A

  by heating phenol with $\mathrm{HF}$ and $\mathrm{KF}$
• Correct answer
  B

  from aniline by diazotisation followed by heating the diazonium salt with $\mathrm{HBF}_4$
• C

  by direct fluorination of benzene with $\mathrm{F}_2$ gas
• D

  by reacting bromobenzene with NaF solution

Hence, the correct answer is option: 'B'.