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 histone antibodies are characteristics of 
Select and explain. 
A. Drug induced lupus, B. Cardiac lupus, C. Lupus nephritis, D. MCTD
A: Drug induced lupus
Answer: A: Drug induced lupus 
Explanation: Ref - Harrison's internal medicine 20e p2517