This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal system, Subject name: Anatomy
Antibody found in myositis 
Select and explain. 
A. Anti jo 1, B. Anti scl 70, C. Anti Sm, D. Anti ku
A: Anti jo 1
Answer: A: Anti jo 1 
Explanation: Refer Harrison 17th/2038