A drug $\mathbf{P}$ inhibits DNA replication in the bacterium $E$. coli by specifically blocking the catalytic site of DNA polymerase activity. That the same drug $\mathbf{P}$ can be used to treat cancers in humans can be explained from the fact that _____

• Correct answer
  A

  mechanism of DNA polymerase is majorly conserved
• B

  both DNA polymerases require RNA as a primer
• C

  both cancer and bacterial cells divide rapidly into large numbers
• D

  DNA replication is bi-directional in both the organisms

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