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: Consider Input: Question: The following metals can be determined by complexometric or chelometric titration: 
 Options:  <1> All without exception. <2> All except transition metals. <3> All except lithium, sodium and potassium. <4> All except alkaline earth metals. <5> All except gold and silver.

Output: 3


Input: Consider Input: Question: Pseudomonas aeruginosa is typically: 
 Options:  <1> Sensitive to most antibiotics used in human medicine. <2> Pathogen obligated. <3> Opportunistic pathogen. <4> Commensal bacteria of the digestive tract. <5> Intracellular pathogen.

Output: 3


Input: Consider Input: Question: 35-year-old woman on hormonal treatment for infertility. He went to the emergency department due to constitutional syndrome and paresthesias in the left side of the body. In blood tests, Hb 7.5 g / dL, reticulocytes 10% (0.52%), platelets 5,000 / uL, normal leukocytes, LDH 1,200 IU / L, direct negative Coombs test, undetectable haptoglobin are detected. Morphology of peripheral blood with abundant schistocytes. Normal coagulation tests. What is the diagnostic suspicion and the most appropriate treatment? 
 Options:  <1> Autoimmune hemolytic anemia. Start steroids. <2> Von Willebrand disease. Administration of desmopressin. <3> Thrombocytopenic purpura. Start steroids and platelet transfusion. <4> Evans syndrome. Start steroids. <5> Thrombotic thrombocytopenic purpura. Treatment with plasmapheresis.


Output: 5