This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Noninvasive Examination of the Heart, Subject name: Medicine
Trans-esophageal echocardiography is better over trans- thoracic echocardiography in? 
Select and explain. 
A. Evaluation of left ventricle, B. Evaluation of left atria and left Atrial appendage thrombus, C. Evaluation of Pericardial fluid, D. Evaluation of commissural fusion
B: Evaluation of left atria and left Atrial appendage thrombus
Answer: B: Evaluation of left atria and left Atrial appendage thrombus 
Explanation: Ans. (b) Evaluation of left atria and left Atrial appendage thrombusRef.: Harrison 19th ed. /270e-2* Trans-esophageal echocardiography is better than trans- thoracic echocardiography as it is better able to evaluate the left Atrial thrombus and left Atrial appendage. Therefore in patients of atrial fibrillation of long standing duration for evaluation of clots in left atrium, trans-esophageal echocardiography is done.