The diagram shows an important concept in the genetic implication of $DNA$. Fill in the blanks $A$ to $C$.

• A
  $A$ - Transcription,$B$ - Translation,$C$ - Francis Crick
• B
  $A$ - Translation,$B$ - Extension,$C$ - Rosalind Franklin
• C
  $A$ - Transcription,$B$ - Replication,$C$ - James Watson
• D
  $A$ - Translation,$B$ - Transcription,$C$ - Ervin Chargaff