Given that array is start from 1 to n
let assume A[i] = x; therefore where can be this x in sorted array ? it is at xth position
B[x]=x but we are getting B[x]=i ===> option A is wrong
Note that A[i] given different results because of no repetition of numbers.. that implies every index of B is accessed and moreover we fill the index of B with i which is different ===> B contains the permutation order of A