The formula

 refers to 

• A

  $\mathrm{B}\mathrm{H}\mathrm{C}$
• Correct answer
  B

  $\mathrm{D}\mathrm{D}\mathrm{T}$
• C

  $\mathrm{D}\mathrm{N}\mathrm{A}$
• D

  $\mathrm{R}\mathrm{N}\mathrm{A}$

Solution

$\mathrm{D}\mathrm{D}\mathrm{T}$ is form by the reaction of chloral $\left(\mathrm{C}\mathrm{C}{\mathrm{l}}_3.\mathrm{C}\mathrm{H}\mathrm{O}\right)$ with phenol.

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