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
Prophylactic forceps in a cardiac diseased patient is used, when head is at station : 
Select and explain. 
A. 0, B. 1, C. 2, D. -1
C: 2
Answer: C: 2 
Explanation: 2