You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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'.

Question: A 13-year-old girl is operated on due to Hirschsprung illness at 3 months of age. Which of the following tumors is more likely to be present? 
 Options: <1> Abdominal neuroblastoma <2> Wilms tumor <3> Mesoblastic nephroma <4> Familial thyroid medullary carcinoma.
Solution: 2
Why? The answer to the given question should be a tumor, therefore Wilms tumor is the correct answer for the given question.

New input: Question: Relating components of human milk and immune system, it is FALSE that: 
 Options:  <1> Lactoferrin protects against infections due to its ability to bind iron. <2> The casein peptides have antimicrobial and immunostimulant activity. <3> Cytokines modulate the immune system in childhood. <4> Complex oligosaccharides can be false receptors for bacteria in the intestine. <5> Lysozyme degrades the cell walls of gram-negative organisms.
Solution:
5