Which of the Following Statements Is NOT True About a Crystallographic

Multiple Choice

Which of the following statements is NOT true about a crystallographic unit cell?

A) It repeats throughout a crystalline structure in three dimensions.
B) It fills all the space in the crystalline lattice.
C) Its dimensions can be measured with X-rays.
D) It always has corners with 90 $\degree$ angles.
E) It represents the smallest repeating unit in the crystal.