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'.

Example Input: Question: As an immunoanalytical technique, flow cytometry is mainly based on the detection of signals:
Options: <1> Chemiluminescent <2> Fluorescent <3> Bioluminescent <4> Piezoelectric. <5> Magnetic
Example Output: 2

Example Input: Question: Indicate, which of the compounds listed below, has a higher acidity:
Options: <1> Acetic acid. <2> Hydrogen bromide <3> Sulfuric acid. <4> Carbonic acid. <5> Nitric acid.
Example Output: 2

Example Input: Question: A baby with 39 C of axillary temperature, edema of the left eyelid and rhinorrhea on the same side goes to the emergency room. What is the most likely diagnosis?
Options: <1> Pansinusitis <2> Left maxillary sinusitis. <3> Left ethmoid sinusitis. <4> Sphenoid sinusitis left. <5> Left frontal sinusitis.
Example Output:
3