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
Most common site of metastasis for choriocarcinoma is : 
Select and explain. 
A. Lung, B. Liver, C. Brain, D. Bone
A: Lung
Answer: A: Lung 
Explanation: Spread of choriocarcinoma Lungs 80% X-ray chest, CT Vaginal metastasis 30% Speculum examination, bhCG Pelvis 20% Pelvic examination, ultrasound, CT Liver 10% Ultrasound, CT Brain 10% CT, bhCG Gastrointestinal rare Ultrasound, bhCG kidney, spleen Reference: Shaw's Textbook of Gynaecology 16th edition page no 516