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 is not used in Crohn's disease? 
Select and explain. 
A. Infliximab, B. Adalimumab, C. Ustekinumab, D. Natalizumab
C: Ustekinumab
Answer: C: Ustekinumab 
Explanation: Ans. is 'c' i.e., Ustekinumab Immumodulators used in Crohn's disease :- i) Anti-TNF-a : Infliximab, adalimumab, ceolizumbab ii)Anti-Integrin therapy : Natalizumab