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'.

[Q]: Question: Glucagon increases the activity of: 
 Options:  <1> Protein kinase A. <2> Acetyl-CoA carboxylase. <3> Pyruvate kinase. <4> Glycogen synthase. <5> Fosfofructoquinasa-1.
[A]: 1


[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.
[A]: 2


[Q]: Question: What does the measurement of skinfolds estimate ?: 
 Options:  <1> The body mass <2> The total body fat. <3> The lean mass. <4> The relationship between fat mass and muscle mass. <5> The fat-free mass.
[A]:
2