The first normal form for relations definition that a relation must contain no multivalued attributes has an equivalent form for ER: all attributes must be single-valued. Select one: True False Question 9 A relation may be in second normal form without being in first normal form. Select one: True False A relation in which a nonkey attribute is dependent on another non-key attribute is in third normal form. Select one: True False Third normal form is important because Select one: a. It eliminates partial functional dependencies b. It eliminates transitive dependencies that can create anomalies c. It removes multivalued dependencies d. It requires that a primary key be defined to uniquely identify each row