This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pathology
A 4 years old child presents with rash on lower limbs, arthritis, and abdominal pain. Urine examination reveals microscopic hematuria. The most likely diagnosis is: 
Select and explain. 
A. Thrombaesthenia, B. Idiopathic thrombocytopenic purpura, C. Systemic lupus erythematosus, D. Henoch Schonlein purpura
D: Henoch Schonlein purpura
Answer: D: Henoch Schonlein purpura 
Explanation: Ans. (d) Henoch Schonlein purpura(Ref: R 9/909-912)The clinical history is suggestive of nephritic syndrome with arthritis and purpura which is a triad of Henoch Schonlein purpura