A craniectomy is being performed on a patient who has Chiari malformation. Once the posterior inferior scalp was removed a C-1 and a partial C-2 laminectomy was then performed. The right cerebellar tonsil was dissected free of the dorsal medulla and a gush of cerebrospinal fluid gave good decompression of the posterior fossa content. Which CPT code should be used?

A. 61322

B. 61345

C. 61343

D. 61458