This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Medicine
Forrest classification is used for evaluating: 
Select and explain. 
A. Upper GI bleeding, B. Liver transplantation, C. Lower GI bleeding, D. Familial adenomatous polyposis
A: Upper GI bleeding
Answer: A: Upper GI bleeding 
Explanation: Forrest classification- stratify patients with upper GI hemorrhage into high and low risk categories for moality. It is also a significant method of prediction of the risk of re-bleeding and is used for evaluation of the endoscopic intervention modalities. Acute hemorrhage Forrest Ia (Spuing hemorrhage) Forrest Ib (Oozing hemorrhage) Signs of recent hemorrhage Forrest IIa (Visible vessel) Forrest IIb (Adherent clot) Forrest IIc (Flat pigmented haematin on ulcer base) Lesions without active bleeding Forrest III (Lesions without signs of recent hemorrhage or fibrin-covered clean ulcer base)