Question: What notation and relationship does this refer to ? Chen notation showing a 1 : 1 relationship Crow's Foot notation showing a 1 : 1

What notation and relationship does this refer to?
Chen notation showing a 1:1 relationship
Crow's Foot notation showing a 1:1 relationship
UML notation showing a 1:M relationship
Crow's Foot notation showing a 1:M relationship

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