Which of the following statements is true?
- Every zero matrix is a square matrix.
- A unit matrix is a diagonal matrix.
- Any non zero matrix is a diagonal matrix.
- none of these
Correct Answer: Option(b)
Every zero matrix is not necessarily a square matrix.
A unit matrix is a diagonal matrix whose diagonal elements are all .
Any non zero matrix need not be a diagonal matrix.
Hence, B will be correct answer.