Question -
Answer -
(A) 27 (B) 18
(C) 81 (D) 512
Solution
Since, general matrix of order 3 x 3is 
This matrix has 9 elements.
The number of choices for 
is 2 (as 0 or 1 can be used)
Similarly, the number of choices for each other element is 2.
Therefore, total possible arrangements(matrices) = 
times= 
Therefore, option (D) is correct.