If a recombinant $DNA$ molecule carrying an ampicillin resistance gene is introduced into an $E. coli$ cell and the host cells are spread on an agar plate containing ampicillin,then...

• A
  Both transformed and untransformed cells will die.
• B
  Both transformed and untransformed recipient cells will grow.
• C
  Transformed recipient cells will grow and untransformed recipient cells will die.
• D
  Transformed recipient cells will die and untransformed recipient cells will grow.