The statement says, "Most of the students who have cleared the final exam have cleared the entrance exam too." This suggests that a majority of students who passed the final exam also passed the entrance exam. However, it does not give us information on the difficulty of the entrance exam relative to the final exam.
The inference that "The entrance exam is easier than the final exam" cannot be conclusively derived from the statement. We do not know the reasons why students passed both exams, so the inference remains uncertain.
Therefore, the correct answer is (c) Uncertain.