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: Surgery
[{'content': 'Which of the following is best indicator of prognosis of soft tissue sarcoma - \nSelect and explain. \nA. Tumor size, B. Histological type, C. Nodal metastasis, D. Tumor grade', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. is \'d\' ie tumor grade "Histologic grade remains the most impoant prognostic factor for patients with sarcomas."- Schwaz "Sabiston writes - Current staging system for soft tissue sarcoma focus on histological grade of the tumor, size of the primary tumor, and the presence or absence of metastasis. Histologic grade is a major prognostic determinant and is based on degree of mitosis, cellulaity, presence of necrosis, differentiation and stromal content"', 'role': 'assistant'}]