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: Physiology
The relation between current, electromotive forces and resistance in a circuit by Ohm's law is stated as 
Select and explain. 
A. i = E/R, B. i = R/E, C. i = RE, D. All of the above
A: i = E/R
Answer: A: i = E/R 
Explanation: Ohm’s law
For electric current flow
i = E/R
For blood flow
Q= ΔP/R