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: Anatomy
All are true about origin and propagation of contractions except 
Select and explain. 
A. The right pacemaker predominates over left, B. Intensity of propagation is greatest at cervix, C. The contractiom spreads from pacemaker towards cervix, D. Speed of contraction is 2 cm/sec
B: Intensity of propagation is greatest at cervix
Answer: B: Intensity of propagation is greatest at cervix 
Explanation: Intensity is greatest at fundus of uterus