This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
patient with atrial fibrillation which is false : 
Select and explain. 
A. Brain imaging is not done, B. trop i/t sent, C. echo done, D. all
A: Brain imaging is not done
Answer: A: Brain imaging is not done 
Explanation: ref : harissons 21st ed