Which of the following is not true about a one$-$to$-$many relationship?

a$.$ The table on the "one" side is also called the parent or left table.

b$.$ The table on the "one" side may or may not have related records in the "many" table.

c$.$ The table on the "many" side may have orphan records, especially if referential integrity is not enforced.

d$.$ The table on the "one" side may have orphan records.