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
Foetal hea sound can be seen by transvaginal doppler from : 
Select and explain. 
A. 5th week, B. 10th week, C. 8th week, D. None of the above
A: 5th week
Answer: A: 5th week 
Explanation: 5th week