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: Which of the following antifungals is used in the treatment of invasive aspergillosis and severe candidiasis including Candida krusei and Candida glabrata ?:
Options: <1> Voriconazole <2> Miconazole <3> Ketoconazole <4> Fluconazole <5> 1 and 3 are correct.

Output: 1

Input: Consider Input: Question: We want to study if Vitamin D can increase the incidence of breast cancer. In our area we have a population registry of cancer. To achieve our goal, all women diagnosed with breast cancer are selected from the register we have and each case pairs with two controls. What study design has been chosen?
Options: <1> Prospective cohort study. <2> Cases and controls study. <3> Case-control study nested. <4> Retrospective cohort study. <5> Ecological study

Output: 3

Input: Consider Input: Question: How many degrees of freedom does a Student's t-test applied to two samples related to a total of 25 individuals?
Options: <1> 26 <2> 24 <3> 2. 3. <4> 48 <5> 47
Output: 2