Task: Question Answering
Input (English): Question: Question linked to image nº14 Suppose that the patient does not refer any family history of interest, has never taken illicit drugs or receives usual medical treatment. An analysis performed in a private mutual shows a microcytic and hypochromic anemia, a normal thyroid function, a serology for HIV negative and a determination of arsenic also negative. The chest x-ray is normal. To continue the study, numerous tests could be carried out. Which do you think could help us more at this time? 
 Options:  <1> A bone marrow aspirate. <2> A complete immunological study with ANA, ANCA and complement. <3> I would not do more tests immediately and follow the clinical evolution for a month. <4> A fibrogastroscopy. <5> A biopsy of the plantar lesion.
Output (English): 4