The Distribution of Vitamin C Amount in the Vitamin Drops

The distribution of vitamin C amount in the vitamin drops produced by a given factory is approximately Normal, with a mean of 60.0 mg and a standard deviation of 0.5 mg. What is, approximately, the probability of drawing at random a vitamin drop with vitamin content between 60.25 and 60.75 mg?

A) 0.16
B) 0.24
C) 0.38
D) 0.62