Ovarian tumours are commonly arise from:: (A) Stroma, (B) Surface epithelium, (C) Germinal epithelium, (D) Endoderm
Answer is B. Epithelial tumors are derived from the ovarian surface epithelium. In general, epithelial tumors comprise 50-60% of all ovarian tumors but malignant epithelial tumors comprise 90% of all ovarian cancers.