Question

Choose the correct alternative:

If A = `[(1, 2),(2, -1)]`, then adj (A) = ______

विकल्प

• `[(1, -2),(2, -1)]`

• `[(-1, 2),(2, 1)]`

• `[(-1, -2),(-2, 1)]`

• `[(1, 2),(-2, -1)]`

Answer 1

`[(-1, -2),(-2, 1)]`