If `P=[(i,0,-i),(0,-i,i),(-i,i,0)] and Q=[(-i,i),(0,0),(i,-i)]` then PQ is equal to (A) `[(-2,2),(1,-1),(1,-1)]` (B) `[(2,-2),(-1,-1),(-1,1)]` (C) `[(2,2),(-1,1)]` (D) `[(1,0,0),(0,1,0),(0,0,1)]`

If i=sqrt(-1),P=[(i,0,-i),(0,-i,i),(-i,i,0)] and Q=[(-i,i),(0,0),(i,-i)] then PQ is equal to -

[(i,0,1),(-1,i,0),(-i,2,1)]+[(2,i,0),(0,2,1),(1,0,-1)]=

If A=[(0,-1),(1,0)],B=[(0,i),(i,0)] then

If A=[(0,-1),(1,0)]B=[(0,i),(i,0)]C=[(i,0),(0,-i)] then

If A=[(i,0),(0,-i)],B=[(0,-1),(1,0)],C=[(0,i),(i,0)] then

If A={:[(0,-1),(1,0)]:} and B={:[(0,i),(i,0)]:} , then

If for a matrix A,A^2+I=0, where I is an identity matrix then A equals (A) [(1,0),(0,1)] (B) [(-1,0),(0,-1)] (C) [(1,2),(-1,1)] (D) [(-i,0),(0,-i)]

If A= [(0,1,1),(0,0,1),(0,0,0)] is a matrix of order 3 then the value of the matrix (I+A)-2A^2(I-A), where I is a unity matrix is equal to (A) [(1,0,0),(1,1,0),(1,1,1)] (B) [(1,-1,-1),(0,1,-1),(0,0,1)] (C) [(1,1,-1),(0,1,1),(0,0,1)] (D) [(0,0,2),(0,0,0),(0,0,0)]