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
Characteristic pathological finding in carcinoid of hea 
Select and explain. 
A. Fibrous endocardial thickening of right ventricle and tricuspid valve, B. Collagen deposition in wall of right ventricle and tricuspid valve, C. Interstitial fibrous thickening of right ventricle and pulmonic valve, D. Mononuclear inflammatory infiltrate in the wall of right atrium
A: Fibrous endocardial thickening of right ventricle and tricuspid valve
Answer: A: Fibrous endocardial thickening of right ventricle and tricuspid valve 
Explanation: The characteristic cardiac pathological findings of carcinoid hea disease are endocardial thickening as a result of fibrous deposits on the endocardium. Echocardiographic examination and right hea catheterization are very useful for the diagnosis of the lesion. If more cardiac valves are affected, multiple valve replacement should be considered. The management of the pulmonary valve lesion depends on the extent of the diseased valve, either by valvulotomy, valvectomy, or valve replacement. Percutaneous valve implantations in the pulmonary and in the inferior vena cava positions have been advocated for high-risk patients. ref - pubmed.cm <a href="