The full name of $DDT$ is .....

• A
  $Dichloro$ $diethyl$ $trichloro$ $ethane$
• B
  $Dichloro$ $diphenyl$ $trichloro$ $ethane$
• C
  $Dichloro$ $trichloro$ $dichloro$ $propane$
• D
  $Dichloro$ $diphenyl$ $dichloro$ $ethane$