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
Which of the following formula of the drug dosage does not depend upon age: 
Select and explain. 
A. Young's formula., B. Clark's rule., C. Cushing rule., D. Cowing's formula.
B: Clark's rule.
Answer: B: Clark's rule. 
Explanation: Clark's rule depends upon the bodyweight of the child.