This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
A 60 yr old female with history 8 blood transfusions in 2yrs.Her Hb-60g/I , TLC-5800, platelet-3.4 Iakhs, MCV-60, RBC-2.1 lakhs/mm3. She is having hypochromic mierocytic anemia. Which investigation is not needed?- 
Select and explain. 
A. Evaluation for pulmonary hemosiderosis, B. Urinary hemosiderin, C. Bone marrow examination, D. G1 endoscopy
A: Evaluation for pulmonary hemosiderosis
Answer: A: Evaluation for pulmonary hemosiderosis 
Explanation: Idiopathic pulmonary hemosiderosisis a rare disease characterized by repeated episodes of bleeding into the lungs, which can cause anemia and lung disease. The body is able to remove most of the blood from thelungs, but a large amount of iron is left behind. Ref Robbins 9/e pg 419