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: Which of the following statements related to breast cancer is correct ?:
Options: <1> Infiltrative ductal carcinoma is the least frequent histological type (around 510%) <2> If the tumor is located in the nipple, it is called Paget's disease. <3> Total mastectomy involves excision of the breast, the areola-nipple complex, and axillary lymph node dissection. <4> It does not produce metastasis in the bone tissue. <5> When there is metastasis, hormone therapy is contraindicated.
Output:
2