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': 'In direct filling gold, failure usually occurs due to? \nSelect and explain. \nA. Compressive stress, B. Tensile stress, C. Shear stress, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Transverse (bending) strength reflects three types of stresses: compressive, tensile, and shear. In direct filling golds, the failure usually occurs from tensile stress because of incomplete cohesion. Bending strength represents an indirect indicator of cohesive strength. Hardness indicates the overall quality of compacted gold.\nRef: Phillips 12th edition. page 415', 'role': 'assistant'}]