This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Pathology
True about early gastric cancer is 
Select and explain. 
A. Limited to serosa, B. Chemotherapy, C. Lymph node metastasis present, D. Limited to mucosa and submucosa
D: Limited to mucosa and submucosa
Answer: D: Limited to mucosa and submucosa 
Explanation: Based on histological features, WHO classified gastric tumors into : Early gastric carcinoma is defined as a cancer limited to the mucosa and submucosa with or wthout perigastric lymph node metastasis Advanced gastric carcinoma: extends below the submucosa into the muscular wall. GENERAL AND SYSTEMIC PATHOLOGY RAMDAS NAYAK FIRST EDITION PGNO.385 IMAGE REF: GENERAL AND SYSTEMIC PATHOLOGY RAMDAS NAYAK SECOND EDITION FIG. 18.8 PAGE NO: 489