The marks obtained by a set of students in an exam are recorded in a grouped frequency table. The maximum number of students are found to be in the range of (70-80) marks.
If the number of students in the ranges before and after the (70-80) range are equal, which of the following is the mode of the data?
(A) 70 marks
(B) 75 marks
(C) 80 marks
(D) (mode cannot be found as frequency is not given)