what are the notable marks of oral cancer for two mark question

Notable marks of oral cancer are as follows--1.patches on the lining of the mouth or tongue, which is usually red or red and white in color 2.mouth ulcers or sores 3.Persistent swelling for over 3 weeks 4.a lump or thickening of the skin or lining of the mouth 5.pain when swallowing 6.loose teeth with no apparent reason 7.jaw pain or stiffness 8.sore throat 9.painful tongue 10.hoarse voice 11.persistent pain in the neck or ear