(F) Pleural effusion (correct)

Pleural effusion presents with

• decreased breath sounds (fluid in the pleural cavity dampens the transmission of sound and mechanical waves)
• dullness to percussion
• decreased tactile fremitus

Note that in pleural effusion, these tests are all "dulled" or are all "decreased".

Pneumothorax presents with

• decreased breath sounds
• hyperresonance to percussion
• decreased tactile fremitus

all on the affected side.

Lobar pneumonia (or a consolidated lung) presents with

• decreased breath sounds
• dullness to percussion
• increased tactile fremitus because the consolidated lung is adjacent to the body wall