A technologist picks up a serum sample with a label indicating it is a 1:4 dilution. What does this tell the technologist about the sample?

A) The concentration of any substance within the sample is 0.01 times its real value.
B) The concentration of any substance within the sample is one-fourth its real value.
C) The concentration of any substance within the sample is 100 times its real value.
D) The concentration of any substance within the sample is four times its real value.

B