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'.

Ex Input:
Question: Why is chlorophyll green ?:
Options: <1> Absorbs all wavelengths of the visible spectrum. <2> Absorbs wavelengths only from the red and ultra-red parts of the spectrum (680nm, 700nm). <3> Absorbs wavelengths in the red and blue parts of the visible spectrum. <4> Absorbs wavelengths only from the blue part of the visible spectrum. <5> Absorbs in the near ultraviolet.

Ex Output:
3

Ex Input:
Question: Which of these equalities is INCORRECT?
Options: <1> Decil 1 = Centil 10. <2> Quartile 1 = Percentile 25. <3> Quartil 2 = Centil 20. <4> Decil 5 = Medium. <5> Quartile 3 = Centil 75.

Ex Output:
3

Ex Input:
Question: If metallic copper is added to a solution of iron (III) chloride, it produces:
Options: <1> A precipitate of copper (II) chloride. <2> A solution of copper (II) chloride and iron (II) chloride. <3> A precipitate of iron (II) chloride. <4> A precipitate of metallic iron. <5> A solution of copper (I) chloride and iron (II) chloride.

Ex Output:
2