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: Medicine
A female patient Nandini presents with upper respiratory tract infection. Two days after, she develops hematuria. Probable diagnosis is - 
Select and explain. 
A. IgA nephropathy, B. Wegener's granulomatosis, C. Henoch scholein purpura, D. Post streptococcal glomerulonephritis
A: IgA nephropathy
Answer: A: IgA nephropathy 
Explanation: IgA nephropathy - The two most common presentations of IgA nephropathy are recurrent episodes of macroscopic hematuria during or immediately following an upper respiratory infection often accompanied by proteinuria or persistent asymptomatic microscopic hematuria . Treatment -ACE inhibitors, if there is persistent proteinuria despite using ace inhibitors, steroids and Immunosuppressants are given. Ref:Harrison 20 th edition pg no 2140