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: Medicine
To differentiate restrictive cardiomypathy and constrictive pericarditis, features favouring constrictive pericarditis are -a) Diastolic pressures are equalisedb) There is mild pericardial effusionc) Thick pericardium is presentd) RV size in increased 
Select and explain. 
A. ad, B. c, C. ac, D. ab
A: ad
Answer: A: ad 
Explanation: None