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 Q]: Question: With vaginal ultrasound, from how long after conception is it possible to see an embryo with a heartbeat? 
 Options:  <1> Between 14 and 21 days. <2> Between 21 and 28 days. <3> Between 28 and 35 days. <4> Between 35 and 42 days. <5> Between 42 to 49 days.
[EX A]: 2

[EX Q]: Question: The probability that a person free of a disease develops it during a period of time, corresponds to: 
 Options:  <1> Chance. <2> Prevalence <3> Specificity <4> Forecast. <5> Risk.
[EX A]: 5

[EX Q]: Question: Regarding the Gastrointestinal Stromal Tumors (GIST), it is true that: 
 Options:  <1> These are tumors of epithelial origin, located mainly at the level of the mucosa of the digestive tract. <2> The mutation of the c-kit gene, which codes for a tyrosine kinase receptor, is characteristic of these tumors. <3> The treatment of localized tumors smaller than 2 cm is fundamentally medical, with the use of Imatinib. <4> They are tumors that only exceptionally bleed. <5> The most frequent localization of these tumors is the small intestine.
[EX A]:
2