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
Which of following in not true about SLE? 
Select and explain. 
A. IgA. IgU against basement of mucosa or increased collagen formation, B. ROR-2 gene mutation, C. Complement c3 activation and fibroblast formation, D. Positive antinuclear antibody test
B: ROR-2 gene mutation
Answer: B: ROR-2 gene mutation 
Explanation: None