Question: If the following constraint was declared for a table named teachers, what would be the default key name assigned by PostgreSQL? teacher _ id bigserial

If the following constraint was declared for a table named teachers, what would be the default key name assigned by PostgreSQL?
teacher_id bigserial PRIMARY KEY
pkey_teachers
teachers_pkey
teacher_id_pkey
The key name must be specified when creating the constraint
pkey_teacher_id

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