This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
A pregnant lady presented with painless bleeding in the 3rd trimester. Most common cause will be 
Select and explain. 
A. Placenta previa, B. Abruptio placentae, C. Vesicular mole, D. none
A: Placenta previa
Answer: A: Placenta previa 
Explanation: Ans a Ref: Sheila balakrishna obs, page 157Clinical features of placenta previaSymptomsClassical presentation of painless antepartum haemorrhage. Recurrent initial bleeding is unusually not severeSignsPallor proportionate to amount of bleedingSize of the uterus correspond to period of amenorrhoeaUterus soft, non tenderMalpresentations and floating headFHS heard.