Question: How is referential integrity enforced in a One - to - Many ? relationship . By using triggers . a None of these . b

How is referential integrity enforced in a One-to-Many ?relationship
.By using triggers .a
None of these .b
.By using primary and foreign keys .c
.By using stored procedures .d
Referential integrity is not applicable to One-.e .to-Many relationships
How is referential integrity enforced in a One -

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