Question: a patient is believed to have gastrointestinal disease he has...

A patient is believed to have gastrointestinal disease. He has been given 5 grams of xylose orally. His stool sample was collected for 3 days and the total content of xylose in the sample is 0.5 gram. Which of the following is more accurate?

1. Patient has malabsorption
2. Patient has maldigestion
3. Patient has gastric ulcer
4. Patient has ulcerative colitis