Consider an Entity-relationship (ER) model where R is defined as a many-to-one relationship from entity set E1 to entity set E2. If E1 and E2…

Consider an Entity-relationship (ER) model where R is defined as a many-to-one relationship from entity set E1 to entity set E2. If E1 and E2 participate totally in R and cardinality of E1 is greater than the cardinality of E2, which of the following is true about R?

1. a) Every entity in E1 is associated with exactly one entity in E2
2. b) Some entity in E1 is associated with more than one entity in E2
3. c) Every entity in E2 is associated with exactly one entity in E1
4. d) Every entity in E2 is associated with at most one entity in E1