This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Factors which help in the descent of the presenting pa during labor are all except 
Select and explain. 
A. Uterine contraction and retraction, B. Straightening of the fetal axis, C. Bearing down effos, D. Resistance from the pelvic floor
D: Resistance from the pelvic floor
Answer: D: Resistance from the pelvic floor 
Explanation: Factors which help in the descent The direct pressure of funds on breech during contractions The hydrostatic pressure of the amniotic fluid Extension and straightening of fetal body Abdominal muscle contractions during bearing down (refer pgno:104 Sheila textbook of obstetrics 2 nd edition)