This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immune system, Subject name: Medicine
Anti RO bodies are present in all except 
Select and explain. 
A. SLE, B. Sjogren syndrome, C. Neonatal lupus, D. Mixed connective tissue disorder
C: Neonatal lupus
Answer: C: Neonatal lupus 
Explanation: Ref image - Harrison's internal medicine 20e p2517