Which code represents computed tomography, head or brain, without contrast material, followed by contrast material and further sections?

Automated systems manage and track inventory. Paper reports:

a. Are now considered obsolete. b. Must still be generated and maintained. c. Should be shredded to maintain patient confidentiality. d. Should be stored off-site for 3–5 years.

_____________ has three main allotropes: white, red, and black

a. Magnesium b. Calcium c. Beryllium d. Phosphorous