This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Valvular Heart Disease, Subject name: Medicine
Loud P2 is found in? 
Select and explain. 
A. Pulmonary HTN, B. MS, C. MR, D. Aortic incompetence
A: Pulmonary HTN
Answer: A: Pulmonary HTN 
Explanation: Ans. is 'a' i.e., Pulmonary HTN o Causes of Loud P2Pulmonary hypertension unless proved otherwise.Eisenmenger s syndrome due to ASD, VSD, PDA.Multiple pulmonary thrombi.