This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
True about complete mole is 
Select and explain. 
A. Karyotype is 69,XXY, B. hcG Levels are < 100,000 mIU / mL, C. Marked trophoblast atypia, D. p57kIP2 immunostaining positive
C: Marked trophoblast atypia
Answer: C: Marked trophoblast atypia 
Explanation: Marked trophoblast atypia is a feature of complete mole, while the rest are seen in partial mole.