You are directed in a lab procedure to add 4ml of water into a test tube. Which is the best measuring device for this job?
A.fill a 2ml serologic pipette 2 times
B.a 1ml in 1/10 serological pipette filled 4 times
C.a 5ml in 1/10 serologic pipette
D. 4 squirts of a disposable eyedropper
E. a Pipetman pipette