This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
60 yr old lady with RA is considered for infliximab therapy tests to be done are 
Select and explain. 
A. LFT, B. PPD skin test, C. PFT, D. Visual exam
D: Visual exam
Answer: D: Visual exam 
Explanation: TNF alpha inhibitors can cause reactivation of latent TB. Othr drugs in TNF alpha inhibitors are adalimumab, golimumab. Ref: Katzung 11/e p633