A unit cell of BaCl2 (flourite structure) is made up of
A 4 Ba+ and 4 Cl-
B 4 Ba+ and 8 Cl-
C 8 Ba+ and 4 Cl-
D 4 Ba+ and 6 Cl-

Hello student,
BaCl2 is of FCC lattice which consists of cordination number f-
Cations Ba+   ---> 8 
Anions Cl-    --> 4
Therefore  8BaCl2 --> 8 Ba+ + 2[ 4Cl-]
Therefore answer (C) is correct  8 Ba+ and 4 Cl-.
Regards