A. Bacterial infection may be confirmed by: 1.white blood cell count 2.hemoglobin level 3.erythrocyte sediemntation rate 4.platelet count. a.1,2,3 b.1 and 3 c. 2 and 4 d. 4 only e. all of the above B. Abrasion is commonly seen on the: 1.lingual surface of the post. teeth 2.occl.surf. of post. teeth 3.incisal edges 4.facial surfaces of teeth Please indicate the source for each answer.