The maxillary final impression must include:
1 . retromolar pads
2 . tuberosities
3 . lingual frenum attachment
4 . oblique ridge
a. 1, 2, 3, 4
b. 2 only
c. 1, 3, 4
d. 1 only
b
RATIONALE: The maxillary final impression must include tuberosities.
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