Complementation occurs when each mutation is in a separate cistron.

"Identify the inaccurate statement concerning the bacteriophage complementation test. a. Complementation occurs when each mutation is in a separate cistron. b. Complementation does not occur when the two mutations are in the same cistron. c. The wildtype phenotype appears in the absence of complementation. d. Complementation pairs of the rII mutant strains are able to lyse the K12 bacteria."

The wildtype phenotype appears in the absence of complementation

Complementation pairs of the rII mutant strains are able to lyse the K12 bacteria.