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: Pharmacology
Which of the following NSAID has good tissue penetrability with concentration in synol fluid? 
Select and explain. 
A. Ketorolac, B. Diclofenac sodium, C. Sulindac, D. Piroxicam
B: Diclofenac sodium
Answer: B: Diclofenac sodium 
Explanation: Ans. is 'b' i.e., Diclofenac sodium Diclofenac has good penetrability and achieves good concentration in tissue fluid, e.g. synol fluid.