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assuming Arrow side 1?

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S1: One Student can enroll at most One Course. True

S2: One Course can be enrolled by any number of students. True

S3: One Student can enroll more than One Course. False (No At most One Either Zero or One)

S4:  One Course can be enrolled by at most one student. False (More than One Student Can Enroll)

Answer: A

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did you notice arrow from student entity ?
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@ I have edited the answer is it correct now?

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