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: The cyclic electronic flow of photosynthesis: 
 Options:  <1> It uses the components of photosystem II together with plastocyanin and cytochrome b6f. <2> Generates ATP and NADPH. <3> It occurs in situations in which NADPH is in short supply. <4> It generates ATP without reducing NADP +. <5> Free O2.
Example Output: 4

Example Input: Question: Which of these statements is NOT a characteristic of phase I clinical trials? 
 Options:  <1> They usually have non-therapeutic goals. <2> They can be done in healthy volunteers. <3> They can be done in patients. <4> They are usually randomized. <5> They are usually open.
Example Output: 4

Example Input: Question: Cause of syphilis: 
 Options:  <1> Trichomonas vaginalis. <2> Neisseria gonorrhoeae. <3> Treponema pallidum. <4> Mycoplasma genitalium. <5> Mobiluncus curtisii.
Example Output:
3