Which ICD-9-CM convention indicates that an entry is not classified as part of the preceding code? 

The consistent delivery of adequate oxygen to the cells is called:

a. circulation. b. perfusion. c. contusion. d. hypoxation.

Care should be taken while removing kinks in large-diameter hose (LDH). For safety reasons, the firefighter should always try to "____" the kink out of LDH.

A. punch B. lift C. dissolve D. kick