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: The reaction of an alkene with metachloroperbenzoic acid causes a cyclic ether which is called:
Options: <1> Furano <2> Dioxane <3> Epoxide <4> Azirano <5> Lactone

Ex Output:
3

Ex Input:
Question: Creatine phosphate:
Options: <1> It is a low-energy hydrolysis compound. <2> It is a compound of energy storage in the kidney. <3> It is formed from ornithine. <4> It is a compound of energy storage in the muscle. <5> It is formed from tyrosine.

Ex Output:
4

Ex Input:
Question: Which of the following statements about focal nodular hyperplasia of the liver is true?
Options: <1> It is considered that its appearance is related to the consumption of contraceptives. <2> The risk of breakage hemoperitoneum is similar to that of the adenoma. <3> There is a risk of tumor degeneration. <4> It behaves as a focal hypovascular lesion in computed tomography with contrast administration. <5> In the histological study of the lesion, in addition to hepatocytes, bile ducts and other liver cells can be observed.

Ex Output:
5