Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: In a 29-year-old woman the following parameters are in the course of a routine analysis: Hb 11.5 g / dL, VCM 70 fl, HCM 28 pg, Ferritin 10 ng / mL, leukocytes 5,200 / mm3, platelets 335,000 / mm3. Physical examination is normal. The most indicated exploration in this situation is: 
 Options:  <1> Gynecological exploration. <2> Study of occult blood in stool. <3> Radiological study of the digestive system. <4> Electrophoresis of hemoglobins. <5> Test of Coombs.
