This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorders of Carbohydrate Metabolism, Subject name: Pediatrics
A child complains of episodes of abdominal distension, bloating and diarrhea on intake of milk & milk products. Which of the following can be given in that child? 
Select and explain. 
A. Ice cream, B. Skimmed milk, C. Cold milk, D. Yoghu
D: Yoghu
Answer: D: Yoghu 
Explanation: Lactose Intolerance in children Types - Congenital/Primary: mutation of lactose gene in chromosome 2 - Acquired/Secondary: Post-infectious, inflammatory, radiation & drugs. C/F - Diarrhea, abdominal pain & vomiting, especially on intake of milk products; - Perianal excoriation Diagnosis - Reducing substances positive in stool; lactase breath test - Confirmed by improvement of symptoms on exclusion of milk - Decreased lactase activity in small intestine biopsy Treatment - Avoid milk, skimmed milk and milk products like ice cream; - Curd/Yoghu may be given