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: Social & Preventive Medicine
[{'content': 'Which of the following substances in human milk is protective against Giardiasis? \nSelect and explain. \nA. Lactoferrin, B. peroxidase, C. Bile salt stimulated lipase, D. PABA', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lactoferrin is bacteriostatic against E.coli. Peroxidases and lipases kill bacteria. Bile salt stimulated lipases kill amoeba and Giardia. PABA is impoant in protection against malaria. Ref: Nutrition and Child Development, K.E. Elizabeth, 4th edition pg: 15', 'role': 'assistant'}]