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: Dental
According to cephalo caudal gradient of growth axis of growth: 
Select and explain. 
A. Decreases from head towards feet., B. Increases from head towards feet., C. Increases from feet towards head ., D. Decreases from feet towards head.
B: Increases from head towards feet.
Answer: B: Increases from head towards feet. 
Explanation: Axis of growth increases from Head towards Feet
3rd month IU = Head 50% of Body length
Birth : Head 30% of body length
Adult = Head 12% of that of body length.