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'.

Q: Question: To calculate the number of different genotypes in any allelic series the formula is applied: 
 Options:  <1> (n-1) / 2. <2> n x (n + 1) / 2. <3> n x (n-1) / 2. <4> (n-1) x (n + 1) / 2. <5> (2n-1) / 2.

A: 2
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Q: Question: The Müller cells of the retina are: 
 Options:  <1> Modified neurons. <2> Glandular <3> Neurogliales of support. <4> Of the microglia. <5> Of the pigmentary layer.

A: 3
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Q: Question: The synthesis with malonic ester is an important method to prepare: 
 Options:  <1> Ketones <2> Aldehydes. <3> Alcohols <4> Amides <5> Acids

A:
5
****