The answer is D.On a recent Praxis II exam, the question displays a Flask that holds 250 ml. The flask has measurement lines starting at 10 ml up to the 250 ml mark. The question asks which amount could NOT have been measured out of the flask.
a. .2 L=200 mL which would be on the flask
b. .05 L=50 mL which would also be on the flask
c. 15 ml--when measuring things and getting sig figs we can either say that it is at a line or halfway between two lines, obviously, 15 would be the halfway point between 10 and 20
d. 12 ml and based on the last answer you would not be able to accurately eyeball 2th's of the distance between 10 and 20