The following are multiple choice questions (with answers) about medical knowledge.   **Question:** 18 year old female presents with an ovarian mass, her serum bio marker are found to be normal except for LDH, which is found to be elevated. The most likely diagnosis is:   (A) Dysgerminoma   (B) Endodermal sinus tumor   (C) Malignant terratoma   (D) Mucinous cystadeno carcinoma
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