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: Pathology
Prognosis in a soft tissue tumour is determined by ? 
Select and explain. 
A. Grade of tumour, B. Bulk of the tumour, C. Depth of Invason, D. Lymph nodal involvement
A: Grade of tumour
Answer: A: Grade of tumour 
Explanation: Ans. is 'a' i.e., Grade of tumor o Whatever the type, the grade of soft tissue Sarcoma is impoant for predicting its behaviour - Robbins