Which radiographic landmark on a panoramic image indicates the floor of the maxillary sinus?
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A
A curved radiopaque line superior to the maxillary posterior teeth
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B
The J-shaped radiolucency below the maxillary tuberosity
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C
A triangular radiopaque area at the pterygomaxillary fissure
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D
The Y-line formed by the nasal floor and sinus wall intersection