A student performed the experiment of determining the focal length of a concave mirror by u-v method using an concave mirror used is 24 cm.The maximum error in the location of of the image can be 0.2 cm.The 5 sets of (u,v) values redcorded by the student in cm are :(42,56),(48,48),(60,40),(66,33),(78,39).The data set(s) that cannot come from experiment and is (are) incorrectly recorded is (are)

Options

A. `(42,56)
B. (48,48)
C. (66,33)
D. (78,39)