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 -
Evaluation for pulmonary hemosiderosis
Urinary hemosiderin
Bone marrow examination
G I endoscopy