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: Which amino acid serves as a starting point for the synthesis of porphyrins (heme group)? 
 Options:  <1> Valina <2> To the girl. <3> Asparagine <4> Lysine <5> Glycine
[EX A]: 5

[EX Q]: Question: What cognitive technique is used in Rational Emotive Behavior therapy to help people who have intellectual difficulties? 
 Options:  <1> Reduction to the absurd. <2> Cognitive distraction <3> Training in social skills. <4> Rational-emotive imagination. <5> Training in self-instructions.
[EX A]: 5

[EX Q]: Question: Which of the following chemical equilibria is heterogeneous? 
 Options:  <1> Acid-base balance. <2> Balance of complex formation. <3> Precipitation balance <4> Oxidation-reduction balance. <5> All those balances that take place in a single phase, usually liquid.
[EX A]:
3