Which of the following are chest radiograph findings associated with a large pleural effusion?

1. Blunting of the costophrenic angle
2. Fluid level on the affected side
3. Mediastinal shift toward the unaffected side
4. Elevated hemidiaphragm on the affected side
a. 1, 3
b. 2, 4
c. 1, 2, 4
d. 1, 2, 3

D
Typical radiographic findings in a large pleural effusion include blunting of the costophrenic angle, fluid level on the affected side, and mediastinal shift to the unaffected side.