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: COMPLETE: in the Krebs cycle 4 oxidation reactions occur, in 3 of them the final acceptor electron is ___ and in the other is ___: 
 Options:  <1> FAD / FMN. <2> NAD + / FMN. <3> NADP + / FAD. <4> NAD + / FAD. <5> FAD / NAD +.

A: 4
****
Q: Question: The most frequent mechanism that induces the activation of the ABL protooncogene in chronic myeloid leukemia is: 
 Options:  <1> Point mutation <2> Gene amplification. <3> Methylation of the promoter. <4> Deletion <5> Translocation

A: 5
****
Q: Question: They produce myelin in the central nervous system: 
 Options:  <1> Astrocytes <2> Ependymal cells. <3> Satellite cells. <4> Schwann cells. <5> Oligodendrocytes

A:
5
****