This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
One of the intestinal enzymes that is generally deficient in children following an attack of severe infectious enteritis is: 
Select and explain. 
A. Lactase, B. Trypsin, C. Lipase, D. Amylase
A: Lactase
Answer: A: Lactase 
Explanation: Secondary lactose intolerence follows small bowel mucosal damage (celiac disease, infective diarrhea) and usually transient, improving with mucosal healing. Ref:Kligman, Behrman, Jenson, Stanton (2008), Chapter 335, "Disorders of Malabsorption", In the book, "Nelson's Textbook of Pediatrics", Volume 2, 18th Edition, New Delhi, Page 1598