This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological oncology, Subject name: Gynaecology & Obstetrics
Tumor marker of Dysgerminoma 
Select and explain. 
A. a-fetoprotein, B. hCG, C. CA-125, D. Lactate dehydrogenase
D: Lactate dehydrogenase
Answer: D: Lactate dehydrogenase 
Explanation: Dysgerminoma is the most common malignant germ cell tumour, accounting for about 30% to 40% of all ovarian cancers of germ cell origin. Placental alkaline phosphatase (PLAP) and lactate dehydrogenase (LDH) are produced by up to 95% of dysgerminomas, and serial measurements of LDH may be useful for monitoring the disease. Reference: Berek and Novak's Gynecology; 14th edition; Chapter 37; Ovarian, Fallopian Tube, and Peritoneal Cancer