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
Drug given in cardiogenic shock is: 
Select and explain. 
A. Dopamine., B. Phenylephrine., C. Atropine., D. Digoxin.
A: Dopamine.
Answer: A: Dopamine. 
Explanation: None