For the following questions, use an ICD-9-CM code book and select the appropriate code(s) for the diagnostic statements given

Only ________% of surfaces with clinically visible calculus are detected radiographically

Fill in the blank(s) with correct word

Electrodes for limb leads should be attached to ________.

A. the wrists and ankles B. the knees and elbows C. a bony area on each limb D. fleshy portions of the limbs E. a highly vascular area