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 the following is an example of Type III hypersensitivity reaction 
Select and explain. 
A. Pemphigus vulgaris, B. Myasthenia gravis, C. Pernicious anemia, D. Arthus reaction
D: Arthus reaction
Answer: D: Arthus reaction 
Explanation: Both serum sickness and arthus reaction are examples of Type III HSR.