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: Biochemistry
[{'content': "Stability of the toxoid in snake's venom is due to \nSelect and explain. \nA. Disulfide bonds, B. Hydrogen bonds, C. Ionic bonds, D. Van der wall's bond", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]