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
In which of the following form the Anti diuretic hormone (ADH) is circulated in plasma : 
Select and explain. 
A. Bound to neurophysin-I, B. Bound to neurophysin-II, C. Bound to plasma albumin, D. Free form
D: Free form
Answer: D: Free form 
Explanation: D i.e. Free form