Question: In a 14-year-old patient with Down syndrome who presents with nucalgia (normal neurological examination) and is going to be subjected to general anesthesia (orotracheal intubation) for elective abdominal surgery, the following should be ruled out: 
 Options:  <1> Atloaxoid instability. <2> Tracheoesophageal fistulas. <3> Brain tumor. <4> Vocal cord hyperplasia. <5> Hydrocephalus
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