<prompt> Pleural effusion in rheumatoid ahritis is typically associated with the following features exceptGlucose 60 mgdlProtein 3 gmdiPleural fluid protien to serum protein ratio of 0 .5Pleural fluid LDH to serum LDH ratio of 0.6  <response>: Ans. is a i.e., Glucose 60 mgdl Causes of low glucose pleural fluid Malignancy Rheumatoid ahritis Empyema Hemothorax Paragonimiasis Churg strauss syndrome Lupus pleuritis occasionally 