The ratio of the volume of water in Bottle P to the volume of water in Bottle Q is 3 : 4. Rajeev drank 40 mL of the water from Bottle P and the ratio then became 13 : 20. How much water was there in bottle P at first?

• A.  60 mL
• B.  80 mL
• C.  300 mL
• D.  400 mL