A patient presents with a pleural effusion, and evaluation shows:

Pleural fluid protein/serum protein ratio > 0.5
Pleural fluid LDH/serum LDH > 0.6
Pleural fluid LDH > 2/3 of the upper limit of normal serum LDH.
Is this a transudate or exudate?
a) Transudate
b) Exudate
c) Mixed effusion
d) Pseudochylous effusion