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: The QT interval of the electrocardiogram indicates the duration of: 
 Options:  <1> Atrial contraction <2> Ventricular contraction. <3> Ventricular relaxation <4> Atrial relaxation <5> Delay in the atrioventricular node.
[EX A]: 2

[EX Q]: Question: What is the maximum volume of air that a subject can breathe out after maximum inspiration ?: 
 Options:  <1> Total lung capacity. <2> Expiratory reserve volume. <3> Inspiratory capacity <4> Vital capacity <5> Residual volume
[EX A]: 4

[EX Q]: Question: It is a heteropolysaccharide: 
 Options:  <1> Hyaluronan <2> Cellulose. <3> Chitin <4> Dextran <5> Glycogen
[EX A]:
1