Select the correct statement (s) -
(a) The C.N. of cation occupying a tetrahedral hole is 4.
(b) The C.N. of cation occupying a octahedral hole is 6.
(c) In schottky defects, density of the lattice decreases,
(A) a, b
(B) b, c
(C) a, b, c
(D) a, c
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