Which of the following descriptions about the specimen is incorrect?[img=786x530]1803c38d86b0179.jpg[/img] A: This picture shows the microscopic features of a benign tumor. B: These tumor cells have cellular and nuclear variation in size and shape. C: The blue arrows show that the ratio of nuclei-cytoplasm in tumor cells is higher than it of normal cells. D: The red arrow shows an abnormal tripolar spindle, an indicator of cellular atypia.