<prompt>  A 60 yr old female with a history of 8 blood transfusions in 2yrs. Her Hb-60gL, TLC-5800, platelet- 3.4 lakhs, MCV-60, RBC-2.11akhsmm3. She is having hypochromic microcytic anemia. Which investigation is not needed?Evaluation for pulmonary hemosiderosisUrinary hemosiderinBone marrow examinationGI endoscopy 