Examine whether `A=[(2,3,4),(0,2,-1),(0,0,1)]` is similar to a diagonal matrix ?

The matrix [(3,0,0),(0,2,0),(0,0,1)] is

The matrix [(1,0,0),(0,2,0),(0,0,4)] is a

The matrix is [(4,3,1),(0,2,3),(0,0,-2)] is:

The matrix A=[{:(0,0,2),(0,2,0),(2,0,0):}] is: a) scalar matrix b) diagonal matrix c) square matrix d) none of these

The matrix [{:(1,0,0),(0,2,0),(0,0,4):}] is a

The matrix [{:(1,0,0),(0,2,0),(0,0,4):}] is a

The matrix [{:(1,0,0),(0,2,0),(0,0,4):}] is a

The matrix A=[{:(1,0,0),(0,2,0),(0,0,4):}] is a .......

Statement 1 : Matrix [{:(a,0,0,0),(0,b,0,0),(0,0,c,0):}] is a diagonal matrix. Statement 2 : If A = [a_(ij)] is a square matrix such that a_(ij)=0AAi ne j , then A is called a diagonal matrix.

Check whether the matrix [(2,1,3),(4,-1,0),(-7,2,1):}] is singular or not