Human Bones classification and anatomy quiz
@KMM's comment above appears to be on the right rack.

"plane" = "flat"
"mixed" = "irregular"
"even" &amp; "odd" = "paired" &amp; "unpaired"


That being said:


A = FALSE because jaw bones are not paired
B = FALSE because sternum is not a long bone (it's a flat bone)
C = FALSE because ribs are not irregular bones (they're flat bones)
D = TRUE because both are flat bones and protect organs
E = FALSE but ONLY under the assumption of the persistence of a metopic suture (frontal suture) causing the frontal bone to be split (and therefore "paired").