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'.

Input: Consider Input: Question: What kind of validity does the degree of confidence refer to, with which it can be inferred that the cause-effect relationships between the variables of an investigation are interpretable in the sense suggested by the researcher? 
 Options:  <1> Internal validity <2> External validity <3> Discriminant validity <4> Ecological validity <5> Construct validity

Output: 1


Input: Consider Input: Question: Which of the following statements is true with respect to the alkaloid morphine ?: 
 Options:  <1> It is an isoquinoline alkaloid extracted from straw of Papaver somniferum. <2> It is a benzylisoquinol alkaloid extracted from latex of Papaver somniferum. <3> It is a tracheal alkaloid extracted from leaves of Papaver somniferum. <4> It is a quinolizidine alkaloid extracted from capsules of Papaver somniferum. <5> It is a pyrrolidinic alkaloid extracted from roots of Papaver somniferum.

Output: 2


Input: Consider Input: Question: Which of the following covalent bonds does not appear in proteins ?: 
 Options:  <1> Phosphodiester linkage. <2> Amide link. <3> O-glucosidic bond. <4> Disulfide bond. <5> Hydrogen bond.


Output: 1


