Surgery A patient has small, oval multiple ulcers in the oral cavity with red erythematous margins. The diagnosis is A Carcinoma B Tuberculus ulcer C Aphthous ulcer D Syphilitic ulcer 💡 Explanation A patient has small, oval multiple ulcers in the oral cavity with red erythematous margins. The diagnosis is ✓ Correct Answer: C. Aphthous ulcer