This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Twin Pregnancy, Molar Pregnancy, Gestational Trophoblastic disease and contraception in special situations (Sour Grapes!), Subject name: Gynaecology & Obstetrics
[{'content': 'Ultrasound of an early pregnancy, diagnosis is? \nSelect and explain. \nA. Paial mole, B. Complete mole, C. Invasive mole, D. Choriocarcinoma', 'role': 'user'}, {'content': "Answer: B \nExplanation: On USG - Complete moles produce a characteristic vesicular ultrasonographic pattern known as 'Snow storm appearance' or 'Honey Comb appearance' Paial moles - fetus is seen along with a multicystic placenta. Invasive Mole: vascular mass on doppler seen invading the myometrium. Multiple cystic spaces maybe seen within the myometrium Choriocarcinoma: May present as a discrete central infiltrative mass. Its a heterogeneous mass due to necrosis and hemorrhage within these tumors. Paial mole Complete mole Invasive mole Choriocacinoma", 'role': 'assistant'}]