This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Which of the following is true regarding Rheumatoid arthritis - 
Select and explain. 
A. Typically involves small and large joints symmetrically but spares the cervical spine, B. Causes pleural effusion with low sugar, C. Pulmonary nodules are absent, D. Enthesopathy prominent
B: Causes pleural effusion with low sugar
Answer: B: Causes pleural effusion with low sugar 
Explanation: "The typical picture of B/L symmetrical inflammatory polyarthritis involving small joints initially and large joints later on, with sparing of the axial skeleton except the cervical spine is very likely, rheumatoid arthritis".

RA causes pleural effusion with low glucose & pH.
Enthesopathy is not seen in RA.