Task: Instance Class Understanding (ontology: Sciences/Computer_Science)

Which of the following classes does 'G3 (Fuhrman)' belong to as one valid explicit type? Context: A histologic grade according to the Fuhrman Nuclear Grading System indicating that nuclei are very irregular, approximately 20um and nucleoli large and prominent.

A. pathologic lymph node stage for colon and rectum according to AJCC 7th edition
B. histologic grade according to the Fuhrman Nuclear Grading System
C. pathologic lymph node stage for kidney according to AJCC 7th edition
D. pathologic distant metastases stage for colon according to AJCC 7th edition

Answer: histologic grade according to the Fuhrman Nuclear Grading System