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

Which of the following definitions best describes the instance 'Stage IB1 (FIGO)'?

A. An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating spread to distant organs.
B. An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating tumour involves lower third of the vagina, with no extension to the pelvic wall.
C. An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating clinically visible lesion limited to the cervix uteri or pre-clinical cancers greater than stage IA <4.0 cm in greatest dimension.
D. An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating invasive carcinoma which can be diagnosed only by microscopy, with deepest invasion <5 mm and the largest extension <7 mm.

Answer: An International Federation of Gynecology and Obstetrics cervical cancer stage value specification indicating clinically visible lesion limited to the cervix uteri or pre-clinical cancers greater than stage IA <4.0 cm in greatest dimension.