A 6 year old patient with retentive posturing (legs outstreched and stiff, or crossed) may be indicative of what condition? 

What is the most common cause of vomiting in pediatric patients? 

A patient who's been vomiting due to chemotherapy

A patient who is dehydrated and vomiting 

A patient who effortlessly spits-up, multiple times a day

A patient who hit thier head, vomits and has syncope