What is the least number of exams that must be passed to qualify for Entrance Exam 3?

To qualify for Entrance Exam 3, passing Entrance Exams 2 and 1 is necessary. This requirement indicates that both specific exams are essential prerequisites for accessing Entrance Exam 3. Completing these exams not only provides the fundamental knowledge and skills needed but also aligns with the program's structured pathway, ensuring that candidates are adequately prepared for the next level.

The other choices do not satisfy the requirement for qualifying for Entrance Exam 3. For instance, passing just Entrance Exam 1 does not fulfill the criteria since it lacks the necessary additional exam. Similarly, passing Entrance Exams 5 and 4 would be irrelevant to qualifying for Entrance Exam 3, as these are not listed prerequisites. Thus, the most accurate and comprehensive answer is to successfully complete both Entrance Exams 2 and 1.