<prompt> According to WHO classification of ovarian tumors, Brenners tumor of ovary belongs to :Epithelial tumoursSex cord stromal tumorsGerm cell tumoursMetastatic tumours  <response>: - Brenners tumor is epithelial ovarian tumor. - rare tumor and usually presents as a solid benign tumor. - occur in peri and post menopausal women. - islands of transitional epithelium in a fibrotic stroma giving it a solid appearance. Reference : textbook of gynaecology Sheila balakrishnan, 2nd edition, pg no:272 