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: Dental
[{'content': 'A 26 year old female patient complains of tooth sensitivity while eating ice-cream. Intra-oral examination reveals Class V lesion with 23. She also gives a history of bruxism. Microfilled composite is most useful in this patient due to: \nSelect and explain. \nA. Increased viscosity, B. Low modulus of elasticity, C. Low filler content, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The low modulus of elasticity of microfilled composites allow them to flex with tooth and protect the bonding interface. This is most useful in bruxism, clenching and stressful occlusion where flexure forces are high.\nReference- Sturdevant 4th ed P:257', 'role': 'assistant'}]