A 60 yr old female with H/O 8 blood transfusion in 2 years. Her Hb-60g/L, TLC-5800,platelet-3.4 lakhs,MCV 60,RBC-2.1 lakhs/mm3.He is having hypochromic microcytic anemia.Which investigation is not needed-

• A. Urinary hemosiderin
• B. G I endoscopy
• C. Evaluation for pulmonary hemosiderosis
• D. Bone narrow examination