Let `A = ([1,0,0], [0,1,0], [0,0,1]).` Then adj (A) = .........
`([-1,0,0], [0,-1,0], [0,0,-1])`
`([1/3,0,0], [0, 1/3, 0], [0,0,1/3])`
`([1,0,0], [0,1,0], [0,0,1])`
`([2,0,0], [0,2,0], [0,0,2])`
if any easy process please explain