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: Pathology
[{'content': 'Malignant gastric ulcers are characterized by all except \nSelect and explain. \nA. ulcer extends beyond the gastric wall., B. Mucosal rugae stop far of ulcers, C. Eccentric crater, D. Margins are raised', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In malignant ulcers mucosal rugae stop far of the ulcers whereas in benign ulcers mucosal rugae projects outwards front the margins of the ulcer', 'role': 'assistant'}]