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: Pathology
True regarding Crohn's disease are all except 
Select and explain. 
A. Scleroderma, B. Transmural involvement, C. Cobble stone appearance, D. Skin involvement
A: Scleroderma
Answer: A: Scleroderma 
Explanation: The skin involvement in Crohn's disease causes erythema nodosum, scleroderma does not occur in Crohn's disease.

Other extraintestinal manifestations of Crohn's disease:
1. Migratory polyarthritis           
2. Sacroiliitis 
3. Ankylosing spondylitis    
4. Uveitis
5.. Hepatic pericholangitis        
6. Primary sclerosing cholangitis
7. Clubbing