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: Pharmacology
Which of the following Dopamine agonist can be used to treat Diabetes mellitus? 
Select and explain. 
A. Bromocriptine, B. Ropinirole, C. Cabergoline, D. Selegiline
A: Bromocriptine
Answer: A: Bromocriptine 
Explanation: Bromocriptine is a D2 receptor agonist approved for Type 2 DM as dopamine alters Insulin resistance.