Answer:
The Student entity would likely be at the center of the ER diagram, as it is the main entity in this system. The Exam entity would be linked to the Student entity with a one-to-many relationship, as each student can take multiple exams. The Record entity would also be linked to the Student entity with a one-to-many relationship, as each student can have multiple records (e.g. academic records, attendance records, etc.).
The Exam entity and the Record entity may also be linked to each other with a one-to-one relationship, as each record may correspond to a specific exam. However, this would depend on the specific requirements of the student information system being modeled.
Step-by-step explanation: