This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Most variable absorption is seen with which route 
Select and explain. 
A. oral, B. Intramuscular, C. Intravenous, D. Per rectal
A: oral
Answer: A: oral 
Explanation: Ref-Goodman and gillman 12th/20 Oral route has maximum variability in absorption