Which of the following symbol represents one-to-one cardinality relationship…

In an Entity Relationship Diagram (ERD), cardinality defines the number of instances of one entity that can be associated with the instances of another entity. For a one-to-one relationship, each instance of Entity A is associated with exactly one instance of Entity B, and vice versa. The standard notations for cardinality are: Single line on both ends: Represents 'exactly one' on each side, indicating a one-to-one relationship. Circle and single line: Represents 'zero or one' on that side. Crow's foot with single line: Represents 'one or many' on that side. Crow's foot on both ends: Represents 'many' on both sides, indicating a many-to-many relationship. Therefore, the symbol with a single line on both ends correctly represents a one-to-one cardinality relationship.