Mathematics · JEE | MATRICES

If a square matrix \( B = [b_{ij}]_{m \times m} \) is a diagonal matrix, then which of the following is true for all \( i \neq j \)?

1. A
   \( b_{ij} = k \)
2. B
   \( b_{ij} = 1 \)
3. C
   \( b_{ij} = 0 \)
4. D
   \( b_{ij} \neq 0 \)