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
Doppler USG in twins is used for : 
Select and explain. 
A. Twin to twin transfusion, B. Conjoined twin, C. Diagnosis of twins, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is d i.e. All of the above Role of ultrasound -- ----- Similar to singleton pregnancy Early diagnosis Detection of fetal anomalies Fetal growth monitoring To asceain presentation at term For placental localisation For amniotic fluid volume Specific for twin pregnancy Determination of chorionicity (best diagnosed at 6 - 9 weeks of gestation) For seeing bility of fetuses, vanishing twins etc Diagnosis & management of : - Twin transfusion syndrome - Single fetal demise Selective fetocide & multifetal pregnancy reduction