While taking bitewing radiograph, what should be the angulation to avoid overlapping of the cusps on the occlusal surface?

Radiology

While taking bitewing radiograph, what should be the angulation to avoid overlapping of the cusps on the occlusal surface?

All of the following form radiolucent stones except:

The usual radiographic appearance of an osteosarcoma is:

A middle aged female presents with slowly progressive weakness of lower limbs,…