Mr Joel Daniels Has Been Admitted to the Ward with Pneumonia

Mr Joel Daniels has been admitted to the ward with Pneumonia. He has a history of heart disease. The registered nurse who is working with you has asked you to work out the required volumes for the medications she is about to give him. The following three questions relate to his care.
-If the concentration of this medication is 200 mg/ml, the volume of ampicillin sodium which needs to be drawn up for this order is

A) 10 ml
B) 7.5 ml
C) 5 ml
D) 2.5 ml