What are the main causes of pleural effusion?

The accumulation of fluid in the pleural space can be caused by increased hydrostatic pressures in the pulmonary circulation, decreased oncotic pressure in the microcirculation, increased negative pressure in the pleural space, increased capillary permeability in the pleura, deterioration of lymphatic drainage, and arrival of fluid from the peritoneal space.
The most frequent causes of transudate are heart failure, hepatic cirrhosis, renal failure, and nephrotic syndrome.
The most frequent causes of exudate are infectious, neoplastic, or immunological diseases.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I, II and III are correct.