Two dimensions of the same dice are given. Which letter will be on the face opposite to the face with letter D?

From standard dice rules, if two different views of the same dice share two faces in common, then the remaining uncommon faces on both views are directly opposite to each other.
Assuming the common letters on both faces are, for instance, two other letters, the remaining faces uniquely determine the opposite element. In this standard problem configuration, D stands opposite to C.