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: Childhood disintegrative disorder is characterized by: 
 Options:  <1> A seemingly normal development during at least the first two years of life. <2> Present only in the female sex. <3> Do not affect the intellectual capacity of people who suffer from it. <4> Does not affect the communication skills of the person. <5> A developmental delay evident from birth.
[EX A]: 1

[EX Q]: Question: The gluten-free diet is the cornerstone in the treatment of celiac disease. In this regard, there are numerous products manufactured with an uncertain composition in terms of gluten, often being misleading labeling. Of the following food groups, which one can we consider completely safe in the diet of a celiac patient? 
 Options:  <1> Canned meat: Hamburgers, meatballs. <2> Milk and derivatives: yogurt, cheese, cream, curd. <3> Sauces, condiments and food additives. <4> Integral pasta: noodles, macaroni, noodles. <5> Delicatessen products, sausages, pâtés.
[EX A]: 2

[EX Q]: Question: The Latin square designs are a type of: 
 Options:  <1> Random designs. <2> Block designs. <3> Intra-subject designs. <4> Mixed designs <5> Unifactorial designs.
[EX A]:
2