Which is bilateral tumour:-
Dysgerminoma
Immatureteratoma
Endodermal sinus tumur
Embryonal cell carcinoma
In the choices of this question, all tumors are of Germ Cell origin. Germ Cell tumors are Mostly Unilateral eg, The endodermal sinus tumour is unilateral in 100% of cases However, dysgerminoma can have 10-15 % bilaterality & teratoma are bilateral in 15% of patients The Epithelial tumors of the ovary are the most common Ovarian tumors and these are bilateral mostly
Ovarian Tumors