Answer to Question 1
ANS: B
Head lice are difficult to remove and spread to furniture and other people if not treated. Caution against use of products containing lindane because the ingredient is toxic and is known to cause adverse reactions. Treatments need to be repeated 12 to 24 hours after the initial treatment. Manual removal is the best option when treatment has failed.
Answer to Question 2
ANS: C
Dental flossing removes plaque and tartar between teeth. To prevent bleeding, the patient should use unwaxed floss. Flossing once a day is sufficient. If toothpaste is applied to the teeth before flossing, fluoride will come in direct contact with tooth surfaces, aiding in cavity prevention.