Correct option is B
Given -Each of C, D, E, F, S, T and U has an exam on a different day of a week starting from Monday and ending on Sunday of the same week.
No one has an exam before D. Only three people have their exams between D and T.
Only one person has the exam between T and S.
C has the exam on Wednesday.
E has the exam on one of the days after F but on one of the days before U.

Thursday of the week does E have the exam.