The unit cell with a b c and = = =90 refers to __________ crystal system.

The unit cell with a b c and = = =90 refers to __________ crystal sys

1.	The unit cell with a b c and = = =90 refers to __________ crystal system.
A.	hexagonal
B.	trigonal
C.	triclinic
D.	orthorhombic
Answer» E.